T42p's battery won't charge while the laptop is turned off

T4x series specific matters only
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maxcreations
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Location: Yekaterinburg, Russia

T42p's battery won't charge while the laptop is turned off

#1 Post by maxcreations » Wed Nov 22, 2017 1:20 pm

I have T42p, working new battery, working charger.
The issue is that the laptop won't charge the battery while it's turned off and the battery indicator on the screen panel does not shows up.
But as soon as I turn on the laptop, battery start charging and indicator shows up.
Also the battery runs out in this laptop about 2hrs, and at this time this battery works about 4hrs in the R50e (with almost identical specs).
Does anybody knows how to fix that? Thanks!

maxcreations
Posts: 13
Joined: Sat Nov 18, 2017 3:33 am
Location: Yekaterinburg, Russia

Re: T42p's battery won't charge while the laptop is turned off

#2 Post by maxcreations » Thu Nov 30, 2017 4:00 pm

So, I dismounted the motherboard but can't locate any blown fuses or other fired up components.
Can anybody help to locate the problem?

Here are the images (about 2 Mb for each)
Back 1
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Back 3
Back 4
Front 1
Front 2
Last edited by maxcreations on Sun Dec 10, 2017 2:03 pm, edited 1 time in total.

Mac-Chatter
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Re: T42p's battery won't charge while the laptop is turned off

#3 Post by Mac-Chatter » Sat Dec 02, 2017 5:51 am

This is only a guess:
I suspect your charger may not supply the proper voltage and a possible Thinkpad's Z-Diode blocks the current. Only if you feel safe for electrical testing you may measure the charger's output voltage on the plug you insert into the Laptop. Be carefull, that you do not short plus> and <minus> and irreversible damage your charger. Look at your charger"s imprint for the voltage output. If you try a different charger be aware that many of them deliver a 3V higher voltage (19V) then the IBM charger (16V).

For a workaround, try charging while suspend to RAM (stand-by) and give uspend to disk (hibernate) a try too.

Enjoy vintage computing, Mac-Chatter
Working Vintage Stuff:
ASUS X72N, WinVista-32; DualCore 2,5Ghz; RAM 6GB; SSD (SATA): 480GB; Gavotte RAMDISK: ~2,5GB (PAE) for pagefile
IBM T41; XP-Pro; RAM: 2GB; SSD (IDE=>SATA):128GB; RAMDISK: 760MB pagefile
Medion 95400; XP-Home; P-1,7GHz; RAM: 2GB; SSD (IDE): 64GB; RAMDISK: 760MB pagefile

RealBlackStuff
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Re: T42p's battery won't charge while the laptop is turned off

#4 Post by RealBlackStuff » Sat Dec 02, 2017 7:38 am

Cannot see any of those pictures!
(Using PaleMoon browser 27.6.1)
Google

403. That’s an error.

Your client does not have permission to get URL /gi9e1ZS-8QI76sqytDT14hEEEh1dhbyxMGq7JvgvZauodu36pEzCaZmOjMkrgPJpiFNO6ic-zvHOLFdq43u3=w1920-h873-rw from this server. (Client IP address: xx.xx.xx.xx)

Forbidden That’s all we know.
Happens regularly, that's why I advise to use the likes of Imgur instead.

Callahan
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Re: T42p's battery won't charge while the laptop is turned off

#5 Post by Callahan » Sun Dec 10, 2017 5:44 am

RBS ... thanks for clearing things up about the images. I also see the same google message. I was wondering if it was my browser or still using WinXP.
...

maxcreations
Posts: 13
Joined: Sat Nov 18, 2017 3:33 am
Location: Yekaterinburg, Russia

Re: T42p's battery won't charge while the laptop is turned off

#6 Post by maxcreations » Sun Dec 10, 2017 2:02 pm

RealBlackStuff wrote:
Sat Dec 02, 2017 7:38 am
Cannot see any of those pictures!
(Using PaleMoon browser 27.6.1)
Google

403. That’s an error.

Your client does not have permission to get URL /gi9e1ZS-8QI76sqytDT14hEEEh1dhbyxMGq7JvgvZauodu36pEzCaZmOjMkrgPJpiFNO6ic-zvHOLFdq43u3=w1920-h873-rw from this server. (Client IP address: xx.xx.xx.xx)

Forbidden That’s all we know.
Happens regularly, that's why I advise to use the likes of Imgur instead.
Sorry, here is the new link with all images https://imgur.com/a/bBidl (also updated links at the top)
I have 2 original 16V 4.5A IBM chargers and both are fine.

kfzhu1229
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Re: T42p's battery won't charge while the laptop is turned off

#7 Post by kfzhu1229 » Wed Dec 13, 2017 11:28 am

maxcreations wrote:
Wed Nov 22, 2017 1:20 pm
Also the battery runs out in this laptop about 2hrs, and at this time this battery works about 4hrs in the R50e (with almost identical specs).
No not at all same specs, GPU wise. the Radeon 9600 / FireGL X2 in T42p is so much more power hungry than the integrated graphics. Also IPS screens takes more juice. I noticed those things one by one as I gradually turn my T43 into a T43p.
My suggestion as to why it doesn't charge while powered off:
1. check where you routed the BT antenna if you did not use it, I had that same problem before on my T43 only to find out that the contacts on the BT antenna shorted out some components on the top left corner.
2. check where the metal parts of the palmrest go to. I accidentally bent one of the metal parts by my keyboard and also shorted out some other components.
3. Use multimeter to test your fuses. I had seen several blown fuses on mobos, but none of what I seen can be diagnosed just by a pair of eyes, and they only show after a conductivity test.
4. If you wanna to go all out and do labour work, take the mobo out of its casing completely and attach the bare minimums (fan, CPU, battery, LCD cable + inverter) and see if it charges while powered off
Patience, boys. All good things to those who wait. – Mother Gothel (Tangled)
_________________________________
T23 PIII 1.13ghz 1gb W7
2xT43 14.1" 2.26 SXGA+ 2gb 1*fp W10
T530i 15.6" i7 16gb fp W10
Flexview UXGA:
A30p PIII 1.2 1gb W7 (IDTech)
T43p 2.26 2gb fp W10

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