prodigy83
Member
My reference only: TT10011
Issue: Screen is not producing picture, no external video either.
History: Very small amount of corrosion found at TP: GPU_CLKREQ_L_R (just below C1951), I did not at first think the corrosion was touching anything except the metal casing on the board. I ended up replacing U7701 because I was not getting 1.2v where I should have been. The higher voltages at first were present. After looking back at TP GPU_CLKREQ_L__R, I cleaned it up and the center pad was gone, I tried to scrape the board with a diamond tipped pen but I could not get the solder to adhere. There was however part of the trace from this TP still there. I scraped that area and routed a jumper wire from there to R1945 pin 2. Continuity to those areas checked out. I am however not getting any S5. I keep coming back to U1200 being a possible issue?
USB-C meter shows 20v but pulls almost no amps other then when first plugging in it shoots up to .27 amps but drops to about .02 amps thereafter but maintains 20v.
What should I be testing or looking for next?
Issue: Screen is not producing picture, no external video either.
History: Very small amount of corrosion found at TP: GPU_CLKREQ_L_R (just below C1951), I did not at first think the corrosion was touching anything except the metal casing on the board. I ended up replacing U7701 because I was not getting 1.2v where I should have been. The higher voltages at first were present. After looking back at TP GPU_CLKREQ_L__R, I cleaned it up and the center pad was gone, I tried to scrape the board with a diamond tipped pen but I could not get the solder to adhere. There was however part of the trace from this TP still there. I scraped that area and routed a jumper wire from there to R1945 pin 2. Continuity to those areas checked out. I am however not getting any S5. I keep coming back to U1200 being a possible issue?
USB-C meter shows 20v but pulls almost no amps other then when first plugging in it shoots up to .27 amps but drops to about .02 amps thereafter but maintains 20v.
What should I be testing or looking for next?
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