Question Dell Latitude e6410 powers off during post?

[shafe88]

Just received a free e6410 that has an issue with powering off during post. When I first turn it on, it will post long enough for me to spend a few seconds in bios(6 seconds max) than powers off like the A/C adapter was unplugged. Go to power it back on and it either powers off before the screen comes on or powers off 2-3 seconds after the screen comes on . It does this repeatedly till I let it sit 10-15 minuets before powering it on, than it's back to 6 seconds of bios time than powering off repeatedly before I get a chance to access bios till I leave it off 10-15 minuets. I noticed sometime it'll go from the dell post screen directly to MATS test even tho I press F2 for bios. Never finishes the MATS test as it always powers off before it has a chance to finish. I was able to get a quick glimpse at the bios log, seen an entry about fan failure and an entry about something being too warm and powering off. were a few more entries, but laptop powered off before I got a chance to read them. I removed the heat-sink and applied new thermal paste, plus replaced the thermal pad on the GPU with a somewhat smoothed penny(1964), even replaced the fan and still no luck. I double checked the fan to make sure it's working, and both fans comes on when the laptop powers on, but noticed they both are make a pulsating noise(sounds kinda like the fan is powering on, than powering off, than powering on before it has a chance to spin down). I've removed the HDD, DVD drive, wireless modem and WIFI adapter, still the same issue.

 

[AlexN.Q]

This seems to be an issue with the motherboard

 

[shafe88]

This seems to be an issue with the motherboard

After some more trouble shooting I figured out the thermal pad I replaced was for the chipset and not the GPU, didn't know the GPU had a thermal pad as previous owner replaced it with thermal paste. Cleaned the thermal paste and applied new with another smoothed penny which allowed me to at least get windows 10 installed. Still having a few issues yet, sometimes it will reboot before windows loads, and their is an issue the fan pulsing and the CPU stuck at 1.1GHZ. Could it be possibly be a A/C adapter issue and not a motherboard issue? FYI I'm using the 90w A/C adapter from my HP, didn't want to waste money on a Dell adapter till I got I seen if I could get it working properly.

 

[AlexN.Q]

Have you tried with a liveCD or WinPE on a usb stick. Try and do a bios update if is any available.

 

[shafe88]

Have you tried with a liveCD or WinPE on a usb stick. Try and do a bios update if is any available.

Haven't tried a live CD yet, have tried to update the bios but it won't install as I don't have a battery or a dell charger(currently using my HP charger) Will try a live CD When I get a chance.