XB1 - 1537 no power supply disappears randomly

[gyl]

Hello dear forum participants. Help me with a small problem with the 1537 gamepad. With a wireless connection to a PC from the battery, the power on the gamepad periodically disappears. And the further the gamepad is from the PC, the more often this happens. With a wire (without a battery and connected to the PC via a wireless connection) this does not happen. Any ideas on how to solve the power supply problem?Sorry for my English, I am writing with the help of a translator.
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? Last Edit: May 22, 2025, 04:05:15 AM by gyl ?
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[gyl]

Hello. I unsoldered Q6 Q7 Q8 Q9, they are working. The resistors in their harness correspond to the ratings in the diagram. The line from J1p11 to Q9p1 is intact. Diode D26 is working. It looks like there is a fault on the MCU board. I checked the capacitors on the MCU board. There is no short circuit. What other parts do you recommend checking? I don?t understand how Q7 and Q6 interact with each other?