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A2442 - no internal display - external display working
- Thread starter tawnytim
- Start date
Do you get 1V8 ad 3V8 at JP600?
Did you test with known good LCD assembly?
Did you test with known good LCD assembly?
I do have pp1v8, but I'll have to pull the board to check for pp3v8, as it's on the other side of the board. I looked extremely closely at the display and cleaned it off. I can confirm that there IS picture on the display, just no backlight.
3V8 is also there, if you get image.
Check diode mode to ground at PPVOUT_LUXE; w/ and w/o LCD connected.
Check diode mode to ground at PPVOUT_LUXE; w/ and w/o LCD connected.
Which area has been affected by liquid spill?
Check if all resistors around UP800 have correct ohm values.
Also check UP800 solders and traces.
Check if all resistors around UP800 have correct ohm values.
Also check UP800 solders and traces.
SON OF A BISCUIT!!!!! MAN! How the hell did I miss that when I was cleaning the board? There was dried soda on many areas and I spent a while cleaning it, but when I put UP800 under the scope, BOOM, soda was there. Is that a BGA package? Can I just remove it, clean up, and put it back?
Yeah, that's BGA package...