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

T42 is dead

T4x series specific matters only
Post Reply
Message
Author
andykrej
Freshman Member
Posts: 101
Joined: Tue Mar 31, 2009 4:28 am
Location: Copenhagen, Denmark

T42 is dead

#1 Post by andykrej » Fri Sep 11, 2009 11:43 am

My dearly beloved T42 won't switch on. I switched it off yesterday evening, left it with battery (60% charged) and charger connected and today it is completely dead. No lights, and neither battery nor a/c adapter can be used to switch it on.

I have checked all fuses on the famous fuse map (except f13, which I can't find), and they're OK.

Is there somewhere on the board, I can check if power is really going into the system?

My next step would be to try with a different CPU. What do you suggest?
X62s / SXGA+ Xiphmont / i7-5500u / Samsung 840 pro/ 16GB
T61 / QXGA IPS / 2.4GHz / 8GB

sktn77a
Senior ThinkPadder
Senior ThinkPadder
Posts: 2010
Joined: Thu Apr 29, 2004 9:44 am
Location: Chapel Hill, NC

Re: T42 is dead

#2 Post by sktn77a » Fri Sep 11, 2009 1:57 pm

You're probably wasting your time swapping out the CPU as they are the most robust component in the entire system. Sounds like a motherboard issue other than a fuze.

:(
Keith
(Formerly 600E, T40, T41, 2xT42, 2xT61p, T420
Currently 4xT430, 2xT460, H520S, Ideapad K1)

andykrej
Freshman Member
Posts: 101
Joined: Tue Mar 31, 2009 4:28 am
Location: Copenhagen, Denmark

Re: T42 is dead

#3 Post by andykrej » Fri Sep 11, 2009 2:01 pm

Well, I did swap it before reading your post. Didn't work.

My battery puts out 12 V (more than the normal 10.8 ) on the terminals. Could that fry the mainboard?
Last edited by andykrej on Fri Sep 11, 2009 4:28 pm, edited 1 time in total.
X62s / SXGA+ Xiphmont / i7-5500u / Samsung 840 pro/ 16GB
T61 / QXGA IPS / 2.4GHz / 8GB

Harryc
Moderator Emeritus
Moderator Emeritus
Posts: 13228
Joined: Thu Apr 12, 2007 8:23 am
Location: Upstate New York

Re: T42 is dead

#4 Post by Harryc » Fri Sep 11, 2009 3:57 pm

Check the output of the AC adapter at it's center pin with a multimeter. It should read 16vDC.

andykrej
Freshman Member
Posts: 101
Joined: Tue Mar 31, 2009 4:28 am
Location: Copenhagen, Denmark

Re: T42 is dead

#5 Post by andykrej » Fri Sep 11, 2009 4:28 pm

It's 16,6 V.

I have another adapter somewhere. I'll check later to see if it's better.
X62s / SXGA+ Xiphmont / i7-5500u / Samsung 840 pro/ 16GB
T61 / QXGA IPS / 2.4GHz / 8GB

Harryc
Moderator Emeritus
Moderator Emeritus
Posts: 13228
Joined: Thu Apr 12, 2007 8:23 am
Location: Upstate New York

Re: T42 is dead

#6 Post by Harryc » Fri Sep 11, 2009 4:40 pm

Remove the battery, remove the RAM. remove all drives and cards/cables. Press the power button down repeatedly for 10 reps, then hold it down for 30 seconds. Plug in the AC adapter. Power on, do you get any system beeps? If not, the system board is most likely bad.

andykrej
Freshman Member
Posts: 101
Joined: Tue Mar 31, 2009 4:28 am
Location: Copenhagen, Denmark

Re: T42 is dead

#7 Post by andykrej » Fri Sep 11, 2009 4:52 pm

Thanks for posting. Already tried that one. Didn't work.

I guess the main board is toast...

I was hoping somebody could point out some components to check. I'm sure it's something easy to fix when you know it.
X62s / SXGA+ Xiphmont / i7-5500u / Samsung 840 pro/ 16GB
T61 / QXGA IPS / 2.4GHz / 8GB

lifrancis
Freshman Member
Posts: 85
Joined: Mon Aug 13, 2007 7:34 pm
Location: Montreal, Canada

Re: T42 is dead

#8 Post by lifrancis » Fri Sep 11, 2009 5:01 pm

If the unit was working before you turned it off, then may be the problem is the switch itself. Try to get another T4X keyboard and see if that will work.
T30 (2366-86U): 2.0GHz, 1.25 GB mem, 100 GB HD, DVD RW, Broadcom b/g wifi, Win XP/Ubuntu
T41 (2373-155): upgraded to 1.8GHz, 1.5 GB mem, 100 GB HD, DVD RW, Atheros 108 super G, Win XP/Ubuntu
T60 (2007-68U):2.0GHz, 2.5GB mem, 500 GB HD, DVD RW, intel abg wifi, Win 7/Ubuntu

andykrej
Freshman Member
Posts: 101
Joined: Tue Mar 31, 2009 4:28 am
Location: Copenhagen, Denmark

Re: T42 is dead

#9 Post by andykrej » Sun Sep 13, 2009 2:38 pm

Have thought the same already, and tried it with a different keyboard. No success :(

I'll try it with a different power supply and post the results.
X62s / SXGA+ Xiphmont / i7-5500u / Samsung 840 pro/ 16GB
T61 / QXGA IPS / 2.4GHz / 8GB

ajkula66
SuperUserGeorge
SuperUserGeorge
Posts: 16851
Joined: Sun Feb 25, 2007 11:28 am
Location: Brodheadsville, Pennsylvania, USA

Re: T42 is dead

#10 Post by ajkula66 » Sun Sep 13, 2009 5:50 pm

Remove all the RAM and power the unit. Does it beep?
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)

Cheers,

George (your grouchy retired FlexView farmer)

FlexView AARP club members:A31p, T43pSF

Abused daily: T520, X200s


PMs requesting personal tech support will be ignored.

Binh
Sophomore Member
Posts: 216
Joined: Mon Nov 05, 2007 9:49 am
Location: Hanoi, Vietnam.

Re: T42 is dead

#11 Post by Binh » Mon Sep 14, 2009 6:28 am

andykrej
Try to do the followings (it work's on my "dead" T41):
- Attach the battery
- Connect the external power supply (i.e. AC adaptor). You may see the light indicating that the battery is being charged.
- Disconnect the external power supply, and, within 1-2 seconds, turn on the computer.
Compaq 386SX > AST 486SX-25 > TP 390E > Compaq N410C > T41 2373-9U5 > T42p 2378-RVU UXGA 1.7@2.45GHz > T60p UXGA modded to T61 8889-ACG with T8300 OCed to 3.2Ghz@1.20V, undervolted to 1.6Ghz@0.775v, Nvidia NVS-140M undervolted to 0.9v, PCI-E ASPM enabled, 11W power in idle.

kankan
Posts: 4
Joined: Mon May 26, 2008 2:52 pm
Location: Dublin Ireland

Re: T42 is dead

#12 Post by kankan » Wed Dec 23, 2009 3:12 pm

Hi there,

I had a similar problem. the ac adapter lead had broken from various people tinking it was a skipping rope. it finally died with a short. I got a new lead on ebay and when pluged it in the t41was completely dead. i tried the remove all drives and memory and battery and hey presto it worked. saved again by thinkpad .com. thankyou
Kancan

Post Reply
  • Similar Topics
    Replies
    Views
    Last post

Return to “ThinkPad T4x Series”

Who is online

Users browsing this forum: No registered users and 62 guests