many days ago the OS detected undervoltage in my Raspberry Pi 4 B and then the Pi gone down and stopped working... i tried using voltmeter to measure the voltage of the GPIO and it is almost good (5v and 3.3v) but it is still not booting. After leaving it disconnected for a while and attempting to boot it again, it succeeded for a bunch of seconds and then stopped working again. it is not sending any UART Messages, and the ACT Led (Green LED) is not blinking. i tried injecting 5v and 3.3v into the GPIO but it didn't boot. (just in case of any problem with the PMIC as a diagnostic approach)
connected Wires on the GPIO:i tried using another PSU (Okdo Raspberry Pi 4 Power Supply 5v 3A 15W), but the problem still persists...
connected Wires on the GPIO:
Code:
3.3v -> "USB to TTL" & "RTC Module"5v -> "Fan"GND -> "USB to TTL" & "RTC Module" & "Fan"SDA -> "RTC Module's DAT"SCL -> "RTC Module's CLK"RST -> "GPIO5 (Pin 26)"TXD -> "USB to TTL's RXD"RXD -> "USB to TTL's TXD"Statistics: Posted by Zorono — Mon Apr 28, 2025 5:15 pm