Take a look at our
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message

t21 not turning on probably bod

T20-T23 Series and T30. NOT for T25-Retro.
Post Reply
Message
Author
fiat682
Posts: 27
Joined: Sat Jun 22, 2019 3:32 pm
Location: Brescia, Italy
Contact:

t21 not turning on probably bod

#1 Post by fiat682 » Sun May 24, 2020 8:40 am

hi i just got a t21 wich rarely turns on and just blinks hdd led, ive read about the bod but the fix is to replace the chip but i cant solder and neither i have the equipment to do so, i updated the bios but i still need to get it to power on again
Lenovo x220i t w7pro
IBM Thinkpad T30 p4 1gb XPpro
IBM Thinkpad T22 BOD (looking for repair)
Lenovo T61 w7
[Restored] Lenovo sl500 win vista

fiat682
Posts: 27
Joined: Sat Jun 22, 2019 3:32 pm
Location: Brescia, Italy
Contact:

Re: t21 not turning on probably bod

#2 Post by fiat682 » Sat Aug 08, 2020 12:59 pm

can someone help?
Lenovo x220i t w7pro
IBM Thinkpad T30 p4 1gb XPpro
IBM Thinkpad T22 BOD (looking for repair)
Lenovo T61 w7
[Restored] Lenovo sl500 win vista

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2484
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: t21 not turning on probably bod

#3 Post by kfzhu1229 » Sat Aug 08, 2020 2:49 pm

Well if it really is a suspect of blink of death, not sure if this would help, but I think if you have a multimeter you can have a chance to look at the ADP3421 chip and see if it's bad. But the risk is if you short some legs together by some butterfingers and that the machine had power connected, you say goodbye to your motherboard.
I haven't had a blink of death before but I had a very similar ADP3420 chip in a Pentium III CPU that failed and I found that out by finding out that one of the legs was shorted to ground despite it supposed to have 2.5V of input! The result is the transistor that generated that 2.5V of input voltage to the chip was burning hot.
viewtopic.php?f=11&t=130095&p=843601&hi ... 20#p843601
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

Bondi
Sophomore Member
Posts: 222
Joined: Fri Dec 21, 2018 5:44 am
Location: Yerevan, Armenia

Re: t21 not turning on probably bod

#4 Post by Bondi » Sat Aug 08, 2020 2:51 pm

Indeed this sounds like BOD. There is another way of curing it, but no guarantees of course. But it still requires soldering (a resistor), but not too complicated. More details here (german) https://thinkwiki.de/BoD
Thinkpads: 330C, 360CE, 560, 755CD, 760LD, 760EL, A21p, A31p, X60s, X230

dr_st
Admin
Admin
Posts: 9692
Joined: Sat Oct 29, 2005 6:20 am
Location: Israel

Re: t21 not turning on probably bod

#5 Post by dr_st » Sat Aug 08, 2020 3:33 pm

Bondi wrote:
Sat Aug 08, 2020 2:51 pm
Indeed this sounds like BOD. There is another way of curing it, but no guarantees of course. But it still requires soldering (a resistor), but not too complicated. More details here (german) https://thinkwiki.de/BoD
I consider doing this on my BoD-affected A21m. I understood that it's considered a safe fix (meaning, if it works, it works, and does not significantly increase risk of damaging other components), and if it doesn't work, it means that the chip is totally dead and has to be replaced. Do you agree with this assessment?
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2484
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: t21 not turning on probably bod

#6 Post by kfzhu1229 » Sat Aug 08, 2020 4:12 pm

dr_st wrote:
Sat Aug 08, 2020 3:33 pm
I consider doing this on my BoD-affected A21m. I understood that it's considered a safe fix (meaning, if it works, it works, and does not significantly increase risk of damaging other components), and if it doesn't work, it means that the chip is totally dead and has to be replaced. Do you agree with this assessment?
Ah I have done this trick to troubleshoot before. This is to trick the SuperIO chip to think everything is working well instead of shutting the machine down. After you solder the resistor make sure to probe around with a multimeter to see if you have connected the surrounding pins too (Pin 24 is Vcc but Pin 22 is Ground!)
With this connected, if it still doesn't work, perhaps now it's a good time to bring out a Voltmeter and measure the voltages on each pin of the leg to see if they are all in spec. Also, put your finger around the surrounding capacitors and transistors to see if they are abnormally hot. Again my dead ADP3420 chip brought down a 2.5V clock rail to ground and as a result the transistors and a capacitor connected to that pin are burning hot.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

Bondi
Sophomore Member
Posts: 222
Joined: Fri Dec 21, 2018 5:44 am
Location: Yerevan, Armenia

Re: t21 not turning on probably bod

#7 Post by Bondi » Tue Aug 11, 2020 10:56 am

dr_st wrote:
Sat Aug 08, 2020 3:33 pm
Bondi wrote:
Sat Aug 08, 2020 2:51 pm
Indeed this sounds like BOD. There is another way of curing it, but no guarantees of course. But it still requires soldering (a resistor), but not too complicated. More details here (german) https://thinkwiki.de/BoD
I consider doing this on my BoD-affected A21m. I understood that it's considered a safe fix (meaning, if it works, it works, and does not significantly increase risk of damaging other components), and if it doesn't work, it means that the chip is totally dead and has to be replaced. Do you agree with this assessment?
Frankly, I have not yet tried this method. But from what I read on german thinkpads forum it's a safe mod, given that nothing is shorted.
My A21p showed BoD symptoms some time ago, to my regret. I was already going to find someone to replace the Atmel chip, but yesterday I tried resitting the RAM modules. And it booted fine several times. I'm not not sure if it was bad RAM contact or it worked because of a 3 months resting.
Thinkpads: 330C, 360CE, 560, 755CD, 760LD, 760EL, A21p, A31p, X60s, X230

fiat682
Posts: 27
Joined: Sat Jun 22, 2019 3:32 pm
Location: Brescia, Italy
Contact:

Re: t21 not turning on probably bod

#8 Post by fiat682 » Thu Aug 13, 2020 1:24 pm

thanks for the replies, regarding the tester i dont wanna risk because i have too "fat" leads, i will try to find someone who solders on pcb and get the 2.2 resistor and see if it fixes, because i have little experience on soldering in general and a too big soldering tip and a normal fixed temp iron
Lenovo x220i t w7pro
IBM Thinkpad T30 p4 1gb XPpro
IBM Thinkpad T22 BOD (looking for repair)
Lenovo T61 w7
[Restored] Lenovo sl500 win vista

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2484
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: t21 not turning on probably bod

#9 Post by kfzhu1229 » Thu Aug 13, 2020 2:47 pm

fiat682 wrote:
Thu Aug 13, 2020 1:24 pm
thanks for the replies, regarding the tester i dont wanna risk because i have too "fat" leads, i will try to find someone who solders on pcb and get the 2.2 resistor and see if it fixes, because i have little experience on soldering in general and a too big soldering tip and a normal fixed temp iron
Well I suppose you can try the multimeter trick again and see if the pins that are supposed to have voltage are shorted to ground. That can be done with the machine off so you don't have anything to risk for
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

fiat682
Posts: 27
Joined: Sat Jun 22, 2019 3:32 pm
Location: Brescia, Italy
Contact:

Re: t21 not turning on probably bod

#10 Post by fiat682 » Fri Aug 14, 2020 10:46 am

what pins im supposed to check and how do can i see if its grounded?
Lenovo x220i t w7pro
IBM Thinkpad T30 p4 1gb XPpro
IBM Thinkpad T22 BOD (looking for repair)
Lenovo T61 w7
[Restored] Lenovo sl500 win vista

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2484
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: t21 not turning on probably bod

#11 Post by kfzhu1229 » Fri Aug 14, 2020 1:19 pm

fiat682 wrote:
Fri Aug 14, 2020 10:46 am
what pins im supposed to check and how do can i see if its grounded?
Here is a pic of the pinout for ADP3421:
https://1drv.ms/u/s!At7-rt1KJ7WviPcyVan ... w?e=AtZD3l
The pin that I have circled in red was the fault I had with my ADP3420 chip (they have the same pinouts), which ended up shorting to ground. In that case switching the multimeter to continuity mode you will get a beep and also saying it is near 0 ohms!
I don't think anything except for pin 16 and pin 22 (Perhaps also 27 and 28) which are the ground pins should have continuity to ground! Some pins may have low resistance but nothing should have a resistance lower than like 8-10Ohms to the ground pin!
Since there isn't anything for you to lose with the machine powered off, test every pin's continuity to pin 22 ground, you should have only pin 16, possibly 27, 28 (and 22 itself) read less than 8-10Ohms in resistance.
If you do have other pins reading less than that, report it here and I'll try to see if it's actually a problem.
Alternatively, if you have steady hands, you can try plugging the laptop in (to ac and/or battery) but do NOT power it on yet. Now switch to DC voltage mode, and measure the voltage for pin 15 and 16 and 24 to ground. If any of them have no significant voltage, you have a problem. Pin 24 should read around 3.3V in voltage.
This can be slightly risky though because if your multimeter probe slips and shorts out the legs, the chip may get fried if it isn't already fried. What can reduce this chance though is instead of probing exactly at the pin legs, find another spot less prone to slipping mistakes that has direct continuity to that leg and measure there.
If those three pins measure normally, now press the power button. AFAIK for this blink of death problem one or more of pin 15 and 16 will drop down to near 0 after the blink of death and then won't go back up until you reconnect the power.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

fiat682
Posts: 27
Joined: Sat Jun 22, 2019 3:32 pm
Location: Brescia, Italy
Contact:

Re: t21 not turning on probably bod

#12 Post by fiat682 » Thu Aug 20, 2020 4:00 pm

i will look into it
Lenovo x220i t w7pro
IBM Thinkpad T30 p4 1gb XPpro
IBM Thinkpad T22 BOD (looking for repair)
Lenovo T61 w7
[Restored] Lenovo sl500 win vista

fiat682
Posts: 27
Joined: Sat Jun 22, 2019 3:32 pm
Location: Brescia, Italy
Contact:

Re: t21 not turning on probably bod

#13 Post by fiat682 » Tue Sep 29, 2020 9:23 am

kfzhu1229 wrote:
Fri Aug 14, 2020 1:19 pm
fiat682 wrote:
Fri Aug 14, 2020 10:46 am
what pins im supposed to check and how do can i see if its grounded?
Here is a pic of the pinout for ADP3421:
https://1drv.ms/u/s!At7-rt1KJ7WviPcyVan ... w?e=AtZD3l
The pin that I have circled in red was the fault I had with my ADP3420 chip (they have the same pinouts), which ended up shorting to ground. In that case switching the multimeter to continuity mode you will get a beep and also saying it is near 0 ohms!
I don't think anything except for pin 16 and pin 22 (Perhaps also 27 and 28) which are the ground pins should have continuity to ground! Some pins may have low resistance but nothing should have a resistance lower than like 8-10Ohms to the ground pin!
Since there isn't anything for you to lose with the machine powered off, test every pin's continuity to pin 22 ground, you should have only pin 16, possibly 27, 28 (and 22 itself) read less than 8-10Ohms in resistance.
If you do have other pins reading less than that, report it here and I'll try to see if it's actually a problem.
Alternatively, if you have steady hands, you can try plugging the laptop in (to ac and/or battery) but do NOT power it on yet. Now switch to DC voltage mode, and measure the voltage for pin 15 and 16 and 24 to ground. If any of them have no significant voltage, you have a problem. Pin 24 should read around 3.3V in voltage.
This can be slightly risky though because if your multimeter probe slips and shorts out the legs, the chip may get fried if it isn't already fried. What can reduce this chance though is instead of probing exactly at the pin legs, find another spot less prone to slipping mistakes that has direct continuity to that leg and measure there.
If those three pins measure normally, now press the power button. AFAIK for this blink of death problem one or more of pin 15 and 16 will drop down to near 0 after the blink of death and then won't go back up until you reconnect the power.
hi sorry for taking so long, btw i tried the continuity method and i get a short only on pin 20
btw forgot to mention that if i connect the psu the battery charge is green but as soon as i press the power button it dies off
Lenovo x220i t w7pro
IBM Thinkpad T30 p4 1gb XPpro
IBM Thinkpad T22 BOD (looking for repair)
Lenovo T61 w7
[Restored] Lenovo sl500 win vista

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2484
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: t21 not turning on probably bod

#14 Post by kfzhu1229 » Tue Sep 29, 2020 10:08 am

fiat682 wrote:
Tue Sep 29, 2020 9:23 am
hi sorry for taking so long, btw i tried the continuity method and i get a short only on pin 20
btw forgot to mention that if i connect the psu the battery charge is green but as soon as i press the power button it dies off
That is bad. Pin 20 is called Core, or core converter voltage monitor. If that pin is shorted to ground then the chip will obviously reject the power good signal and shut the computer down!
And what's worse is that looking at the schematics below, Pin 20 is directly connected to the main power supply of the CPU, so this means that your CPU's power supply is shorted!
Before concluding the board or the ADP3421 chip as faulty, remove the CPU and see if it is shorted any longer. If you are lucky you can just be dealing with a dead CPU.
Note that if you do this you get the exact same behaviour as blink of death and without a CPU installed that's normal.
https://1drv.ms/u/s!At7-rt1KJ7WviPtf0Aq ... Q?e=S07uvP
Just to verify you are not measuring the wrong pins, measure resistance on the capacitor labelled C805 in the top view image on this thing (it's the big black capacitors right beside the CPU socket, all 5 of them are connected with each other so doesn't matter which one you measure). One side of those capacitors is connected to that Pin 20 and the other side is to ground.
It is entirely possible one of those capacitors is bad too but it might not be very easy to determine.
Maybe remove the CPU and connect a 1.5V AA/AAA battery to the capacitor to see what gets hot (and that's the only way you know what's shorting out the rail). Be CAREFUL about the polarity in this case as reversing it kills the entire board full stop. The plus side is denoted on the motherboard itself and the capacitor also has a stripe on that side (this is DIFFERENT than the circular capacitors where the stripe side is negative) Do not exceed 1.75V!
If nothing gets hot, try putting the CPU back and turning the system on with the battery attached like that and see if you still have the bod.
viewtopic.php?t=47660
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

fiat682
Posts: 27
Joined: Sat Jun 22, 2019 3:32 pm
Location: Brescia, Italy
Contact:

Re: t21 not turning on probably bod

#15 Post by fiat682 » Tue Sep 29, 2020 4:55 pm

cpu should be ok since it sometimes starts and worked for hours (i left it on the first times to see if it would fix itself)
i dont wanna ruin the board since i have no experience in such stuff.
if i find someone wich replaces the chip will it work or it will be a waste of money?
Lenovo x220i t w7pro
IBM Thinkpad T30 p4 1gb XPpro
IBM Thinkpad T22 BOD (looking for repair)
Lenovo T61 w7
[Restored] Lenovo sl500 win vista

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2484
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: t21 not turning on probably bod

#16 Post by kfzhu1229 » Tue Sep 29, 2020 7:59 pm

fiat682 wrote:
Tue Sep 29, 2020 4:55 pm
cpu should be ok since it sometimes starts and worked for hours (i left it on the first times to see if it would fix itself)
i dont wanna ruin the board since i have no experience in such stuff.
if i find someone wich replaces the chip will it work or it will be a waste of money?
Well then I suppose the next time the board came on, check on the 5 big capacitors beside the CPU (if it is not blocked by the heatsink) to see if there is a capacitor significantly hotter than the others. If so, simply cutting one side of the capacitor off the motherboard might just fix the board (because in that case you just have a dead capacitor and you don't need all 5 of the capacitors to work).
Well the problem is that if you cannot know whether it's the capacitors or the chip itself faulty, spending all the hassle to replace the chip can be a total waste of time (as for a capacitor fault as I said before you can fix it with a razor knife).
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

blackop
Posts: 22
Joined: Thu Oct 01, 2020 7:47 pm
Location: Istanbul, Turkiye

Re: t21 not turning on probably bod

#17 Post by blackop » Fri Oct 02, 2020 11:35 am

I dont know if T21 is effected with same problems which T23 has but take a look in the links below. i had a non-booting T23 motherboard and re-soldering mentioned components on motherboard got it back to life. i dont know how to solder either, i took the motherboard to TV & Radio repair guy and he soldered for me.

https://thinkwiki.de/T23_Spulenbilder
https://www.ozzu.com/hardware/ibm-think ... 55332.html
My ThinkCollection: X20-X31-X40-X601s-X230-T23-T42-T60

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2484
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: t21 not turning on probably bod

#18 Post by kfzhu1229 » Fri Oct 02, 2020 2:08 pm

blackop wrote:
Fri Oct 02, 2020 11:35 am
I dont know if T21 is effected with same problems which T23 has but take a look in the links below. i had a non-booting T23 motherboard and re-soldering mentioned components on motherboard got it back to life. i dont know how to solder either, i took the motherboard to TV & Radio repair guy and he soldered for me.
Those are coils for the different power supply sections of the motherboard. I had that once on a T43 motherboard that I had baked in an oven to deal with the GPU failure. I don't think T22 has this problem.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

solidpro
Senior Member
Senior Member
Posts: 659
Joined: Thu Jun 11, 2020 11:46 am
Location: Milton Keynes, GB

Re: t21 not turning on probably bod

#19 Post by solidpro » Fri Jun 03, 2022 7:51 am

Just wanted to report that I ordered a batch of new ADP3420 chips along with 2.2k resistors and I had 3 BOD thinkpads (T20, T21 and T22).

I pretty easily (with flux, capston tape and a heat gun) removed the ADP3420 chips and re-soldered new ones on. No change. Removed and re-soldered many times, and checked each leg to pad using continuity and a microscope to confirm my soldering was good. No change.

I soldered the resistor onto the legs required. No change. Apart from when you hit the power button you get a tiny 'click' from the resistor as well as the blink.

Seems like a massive waste of time to me. A time bomb model that is not worth much (when the T23 is most powerful and suffers none of these issues). I watched a guy on youtube do the same as me and got the same result.

Those forums threads online of these mods being a definitive fix seem a bit overblown to me.
http://Ret.Rocks - Rare Used & Restored Vintage Computing for Sale!
Wanted: 220, 315D, 320, 350x, 355x, 500, 510, 530CS, 730TE, 750P, 755CD, Any 8xx Series, A20p, A21p, A22p, A31p, T40p
Currently For Sale (Restored): 560Z, 380Z, T20, T21, T22, R61, R51

kfzhu1229
Senior ThinkPadder
Senior ThinkPadder
Posts: 2484
Joined: Tue Sep 22, 2015 10:59 pm
Location: Toronto, Canada

Re: t21 not turning on probably bod

#20 Post by kfzhu1229 » Fri Jun 03, 2022 12:49 pm

solidpro wrote:
Fri Jun 03, 2022 7:51 am
Just wanted to report that I ordered a batch of new ADP3420 chips along with 2.2k resistors and I had 3 BOD thinkpads (T20, T21 and T22).

I pretty easily (with flux, capston tape and a heat gun) removed the ADP3420 chips and re-soldered new ones on. No change. Removed and re-soldered many times, and checked each leg to pad using continuity and a microscope to confirm my soldering was good. No change.
You ordered the ADP3420? I thought you have to order the ADP3421 instead, but not sure what differences there are between these chips.
I did however had a dead MMC-2 Pentium III 750Mhz module that I fixed by replacing that ADP3420 chip before.
Dell Lat CP MMX-233 64mb 40gb W2k
600 PII-266 416mb 40gb WXP
T23 PIII 1.13ghz 1gb W7
Precision M4300 X9000 8gb 160gb WUXGA Ultrasharp fp W10
T530i 15.6" i7 16gb fp W10
UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10 (Sharp)
Lat C840 P4-2.5 2gb 60gb W7 (Ultrasharp)

solidpro
Senior Member
Senior Member
Posts: 659
Joined: Thu Jun 11, 2020 11:46 am
Location: Milton Keynes, GB

Re: t21 not turning on probably bod

#21 Post by solidpro » Sat Jun 04, 2022 5:48 am

It was one or the other, but whatever one it was it was the same as the ones I removed.... Just saying I think from mine and a few other's experience it is a waste of time...
http://Ret.Rocks - Rare Used & Restored Vintage Computing for Sale!
Wanted: 220, 315D, 320, 350x, 355x, 500, 510, 530CS, 730TE, 750P, 755CD, Any 8xx Series, A20p, A21p, A22p, A31p, T40p
Currently For Sale (Restored): 560Z, 380Z, T20, T21, T22, R61, R51

Post Reply
  • Similar Topics
    Replies
    Views
    Last post

Return to “ThinkPad T20-T23 & T30 Series. NOT for T25-Retro”

Who is online

Users browsing this forum: No registered users and 44 guests