MP 1,1-5,1 MP 5.1 reboots after 3 mins to white screen and keeps rebooting

[cpnotebook80]

?
Everything was fine till I had to fix my modem issue and had to move the MP5.1 and all cables and disconnect it. I plugged all back in and i was getting white screen with just logo (I have mojave) n nothing else. So I decided to open up and reseat the cpu tray, clean some dust from inside, and checked the nvme to make sure all is good. It booted up fine to the nvme boot disk which is mojave. Then after 3 mins it shut down again and restarted itself to white screen and then again restart like a loop.

I unplugged back power cord, waited and tried again and was able to log into the desktop. This time i switched the start up drive to my hdd which I have as a spare(mojave os) to see maybe if it was the nvme drive. But when it did boot up to the hdd, same thing happened after 2 mins or so it restarts itself and stuck on a restart loop.

I have been at this for 3 hours on and off. I have not changed or installed anything on the machine since its my backup for files etc and use my mbp often for work.

I re-checked the cpu tray and for the crash logs, which one am i suppose to be looking to identify? since its all very confusing. I have attached one from earlier but not sure if that shows the culprit. Maybe someone can have some insight. much thanks again.

I had tried the NVRAM reset etc also
This time I had around 10 mins on the desktop on the nvme before it crashed again. SO I just shut it all done.

 

[tsialex]

?
Everything was fine till I had to fix my modem issue and had to move the MP5.1 and all cables and disconnect it. I plugged all back in and i was getting white screen with just logo (I have mojave) n nothing else. So I decided to open up and reseat the cpu tray, clean some dust from inside, and checked the nvme to make sure all is good. It booted up fine to the nvme boot disk which is mojave. Then after 3 mins it shut down again and restarted itself to white screen and then again restart like a loop.

I unplugged back power cord, waited and tried again and was able to log into the desktop. This time i switched the start up drive to my hdd which I have as a spare(mojave os) to see maybe if it was the nvme drive. But when it did boot up to the hdd, same thing happened after 2 mins or so it restarts itself and stuck on a restart loop.

I have been at this for 3 hours on and off. I have not changed or installed anything on the machine since its my backup for files etc and use my mbp often for work.

I re-checked the cpu tray and for the crash logs, which one am i suppose to be looking to identify? since its all very confusing. I have attached one from earlier but not sure if that shows the culprit. Maybe someone can have some insight. much thanks again.

I had tried the NVRAM reset etc also
This time I had around 10 mins on the desktop on the nvme before it crashed again. SO I just shut it all done.

Some suggestions:

1. check the CPU tray northbridge heatsink push pins, take a look if any of the pins are not broken.
2. check the RTC battery voltage, if the BR2032 coin battery is below 3.00V, replace it. RTC battery not working cause all sort of weird crashes. Btw, only replace it with another BR2032, the chemistry of CR2032 is not appropriated for the high temperatures below the GPU and will die in months.
3. check any of the PCIe cards for oxidation on the golden fingers that connect to the PCIe slot.

If you can boot again, save a SystemInformation report (>AboutThisMac>SystemReport>SystemInformation>File>Save), zip it and PM me it.

 

[cpnotebook80]

ok will do thanks! strangely at 2am, I booted it up and it was up and didnt crash, mind you it was for 10 mins till I shut it down and went to bed. I usually leave it on but was afraid if it crashed in the middle of the night, it would be looping forever till next day.

The machine is back up and not shutting down so crossing fingers.