820-00165 no backlight, just image

[kevinklinkmuller]

Have a 820-00165 with no backlight, just image. Corrosion around U7701.

Interestingly im getting 8V on PPVOUT_SW_LCDBKLT_FB

I've reflowed U7701 still the same.

I'm wondering If i should just replace the chip?

However, I can only find the 15BA D68B version of this chip. and the one on the board is 5409 d68b

 

[2informaticos]

U7701 is very sensitive to corrosion.
Always need to change it in such case.
Also check its continuity to L/D7701, especially XW7720 bridge.

 

[kevinklinkmuller]

awesome, would 15BA D68B be compatible? it's still LP8550

 

[2informaticos]

It should work.
I never checked the body marking...

 

[kevinklinkmuller]

awesome will wait for that in the post and i'll get back! thank you!

 

[kevinklinkmuller]

U7701 did the trick! thank you very much!!!