I've been a long time fan of Thinkpad hardware, and recently decided to try my luck putting together a working T440p from parts. Unfortunately, I may have picked a loser, as the motherboard doesn't want to power on.
When I plug in power, the CPU fan twitches, and the power light on the power button will blink three times, pause, and then blink three times again. When I press the power button, the same 3 and 3 blink pattern happens. It doesn't beep at any point.
I have removed the battery, CMOS battery, wifi card, keyboard, DVD drive, and tried with a single known good memory stick in either, or neither memory slot. I've held power for 10 seconds, 30 seconds, 60 seconds, with and without power cord attached.
Oddly, if I hold the power button, and then plug it in, the power button light stays on, but nothing else happens.
Kinda thinking dead motherboard, but since this pattern seems to be pretty common, I thought I'd ask here first before plunking down on a replacement. Any and all community wisdom is appreciated!
- *Senior* Admin
- Posts: 7467
- Joined: Tue Apr 13, 2004 9:40 pm
- Location: San Francisco -> Florida -> Georgia
did you check the hardware maintenance manuals.. the one for your thinkpad..? look UP there to the "HMM" link..
Sysop - forum.thinkpads.com
She was not what you would call refined,
She was not what you would call unrefined,
She was the type of person who kept a parrot.
Wondering if there is a fuse or something that could be blown. Lacking any "AHAH!" moments, I'm probably going to pull out the MB, and break out the tester this weekend.
On the good side, I won a second (working) T440p auction for $30, and $15 shipping. At least I won't be down a system while I noodle this out.
For those who are interested in the resolution, I ran down a bunch of things before finding the dead part.
- 5s, 30s, etc reboot with batteries removed: Same issue.
- Tried known good RAM: Same issue.
- Tried multiple different power supplies: Same issue.
- SPI FlashROM'd the BIOS, to a known good ROM: Same issue
- Purchased and swapped in a known good motherboard: SAME ISSUE.
Of course, now I have a pile of spare parts I don't need...
Glad you got it working.
You should be able to resell the second T440P for a lot more than you paid for it. Probably you have already done so.
- Similar Topics
- Last post
Who is online
Users browsing this forum: No registered users and 26 guests