Hello.
This laptop LENOVO YOGA 2 PRO was absolutely dead until we found a short to 1.35vsus line which turned out to be from 1 out of 8 total RAM onboard chips ELPIDA EDJ8416E6MB-GN-F (U15 on schematics).
When we desoldered the chip, the short got away, the laptop turns on and draws 0.5a for like 10 seconds, without image, and then turns off and this boot loop continues forever.
Do you know if this RAM chip must get replaced or it can work without it, just with less memory capacity? The motherboard is VIUU3 NM-A074 REV 1.0.
Or maybe there is a way to isolate it?
Attached is schematics. Thank you.
This laptop LENOVO YOGA 2 PRO was absolutely dead until we found a short to 1.35vsus line which turned out to be from 1 out of 8 total RAM onboard chips ELPIDA EDJ8416E6MB-GN-F (U15 on schematics).
When we desoldered the chip, the short got away, the laptop turns on and draws 0.5a for like 10 seconds, without image, and then turns off and this boot loop continues forever.
Do you know if this RAM chip must get replaced or it can work without it, just with less memory capacity? The motherboard is VIUU3 NM-A074 REV 1.0.
Or maybe there is a way to isolate it?
Attached is schematics. Thank you.
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