Working on this Yoga 910 which has a blinking keyboard- no display. It has 20v on charger and the current draw is 0.61A and this cycles to 0 then up again on a loop. The keyboard flashes as the laptop cycles.
The battery charges and I have 8.9v on PL12 which I think is ok. This cycles to 2.5v and back upto 8.9v.
I've tried changing PU4 and light reflow of CPU no change.
No short to ground on coils
I've noticed a whining leak sound which seems to be coming from PL12 - it is hot to touch. Is it worth changing this or any other tips?
thanks
The battery charges and I have 8.9v on PL12 which I think is ok. This cycles to 2.5v and back upto 8.9v.
I've tried changing PU4 and light reflow of CPU no change.
No short to ground on coils
I've noticed a whining leak sound which seems to be coming from PL12 - it is hot to touch. Is it worth changing this or any other tips?
thanks
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