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larkan511
Paper Tape
Posts: 1
Registered: ‎11-07-2017
Location: US
Views: 1,084
Message 1 of 1

Thinkpad 20CD 3 blinking red lights with adapter plugged in, hot motherboard chip, need help!

I needed to replace my keyboard on my Thinkpad Yoga 20CD, so I swapped parts, and long story short, no post, no BIOS, no external video.  When I plug in the AC adapter, I get 3 blinking red lights on the "i" Thinkpad LED.  If I press the power button, the backlight on the keyboard comes on for 1 second, fades away, and the red LED stays on.  Fan on the CPU spins for about 3 seconds, then stops.  There is a chip on the motherboard underneath the card reader that gets EXTREMELY hot on both the AC power and battery, even without turning it on. 

 

I guess I just need to know if I somehow fried the board when swapping parts?  If there is a short somewhere on the board?  Is there anything I can do to get it to boot, and prevent it from getting so hot?  I've tried a complete power drain, removing the CMOS battery, and leaving it sit overnight with nothing plugged in, all to no avail.  Any help or suggestions wold be greatly appreciated.

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