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So, I replaced Q7260 and pp3v3 returned PPBUS_g3H also returned to normal value, on L7220 I found C7252 with low insulation. But is U1800 normal for it to be very hot? Or did I create problems with it? Now I only have 5V S3 to restore
I found a hole on Q7260 and replace it on L8220 I don't have low insulation. I removed F7040 to see the short on ppbus_g3h, but now I get 3.24v is it not that I have to replace u7000? One last question, I found Q7260 on a SIZ710DT donor card only that instead of 17W, there is 15W I have to check...
I have examined the power supply circuit of the 5v and the 3v3
starting from C9487 up to U7101 and pin 25.
in both I find the voltage unstable, can the defect be Q7260?
I removed the U7500 I realized that there is an interruption on pad 14 or the PPBUS_G3H pro pad to rebuild it and let's see what happens
But the question that arises is: did it stop by corrosion or why did the U 7500 go short?