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Okay, so I wanna clear something up... you asked previously "When you start the board with internal LCD connected, check for voltage at R8320 pads."
Boardview shows R8320 as a 4 pin pad as I took a screenshot of, but when I look at the board it looks like pins 1 and 2 are a bridged pad to 3 and 4. Unless the 2 tiny pads above them are 3 and 4.
Please see comparison pics and let me know which letter is right. A or B.
So what are the two small points above the pads that I marked 3 and 4 in image A?
Cause I don't have another panel to try. If I got the board working then I would've spent the money on another panel but if I can't get the board working then I'm not spending 300-400 on a good panel.
When I connected the good board before sending it back it showed the backlight and this one doesn't still so that means something is still wrong with this one.
If you get 3V at DP_INT_HPD, internal LCD is detected and probably the image is there; but not visible on the cracked screen.
Until BKLT_SD gets 0V, you cannot get any voltage at D7710.
Do you still have 3V at BKLT_EN_R?
If you got backlight with another 4924 board on this LCD, then the problem is in the actual board.
"So what are the two small points above the pads that I marked 3 and 4 in image A?"
Are the pads for Kelvin connection lines of Isense, not used in this case; directly connected to pins 1 & 2 respectively.
Sorry about that. I thought I was making contact with the pins but it turns out I wasn't. Thought my probes were small enough as they are tiny but not tiny enough to fit underneath after all. Yes all the components around it are getting power. Need to find smaller probes.
Why try to make contact underneatch the chip?
Even on bigger QFN chips, you can easy make a short between pins.
ALWAYS measure touching the pins of surrounded components connected to the chip pin you want to test.
Use schematic/boardview to find proper test point.