Why does it keep turning off?

check the capacitors and your transistor might be in shock and getting really hot and keep shutting the system,look for bad zener or diode

back the carb screw out 1/4 turn.

No, machine keeps running, but lamp is out. This is cool down cycle. Dont turn it off. It will vary from 15 seconds up to 2 minutes. This is pretty normal.

I have minor shutdown problem with mail, won't close or shut down. My ans top left APPLE drop down, force closure, turn of each programme listed. For me works a treat.

Could be any of several things. If the crank sensor is marginal and not sending pulses, the fuel pump is shut off. This is for safety. The pump is energized for a few seconds as key is turned in preparation for starting then engine must rotate normally to keep the pump on. If it stops, in a few seconds the fuel is cut off.

did you use the same RAM-memory on the second main-board ?try different ram memory, it might solfe your problem.
If it does, your first main-board whill be okay to.

please keep me informed.

Bart

your ups cannot get enough power from the outletreplace the battery of your ups 12volt 7ampere reset the small breaker. when it still turning off test the continuity of the small breaker and the cord to plug use a multitester.

check fuel pressure, should be 40 psi.
try 2 things

spray starting fluid in air intake to see if it will stay running. It's fue then.

Try turning key to on nd wait 5 seconds for system to build pressure and pump to shut off. Turn key off, wait for relay clcik noise or 10 seconds. then turn key to ON again and wait 5 seconds to build pressure again. Then start engine. If it starts better, you have a bad check valve in the fuel pump or a bad pressure regulator on the fuel rail (unlikely).

report back

TV turns on for 2 seconds then shuts off. Sleep/timer blinks. Won't go back on unless unplugged and plugged back in

I will need the model number of your set in order to make any suggestions as to what possibly could be causeing the problem