I need some help for a old Fluke 8840 DMM. It has some strange behavior after pressing the power button and perhaps somebody already knows the answer.
So, here is the fault:
After pressing the power button the display starts to flicker with a random pattern. Sometimes it flickers for 2-3 cycles (each cycle is flickering for about one second, gets dark for a shorter period and starting to flicker again) and then stays dark, some other times it is in an infinite loop of the cycles described above.
Any advices where to start my investigations?