Mass spec will not turn on

Good Morning,


We have a 7890A GC fitted with a 5977 MSD. Out of no where the MSD turned off. log states the it cannot be connected to and it's off.


We cannot regain power to the MSD. Tried checking the cables going in, even replacing them with spare ones. Using a different power socket which we know works.Opened up and removed the metal PCB case fromt eh MS, checked all the fuses and none had blown. There are pictures underneath of this (they are a little dusty though).


Does anyone have any siggestions on what is wrong with this instrument? I have read somewhere that a side board maybe damaged, I'm assuming the power board where the power first enters the MSD but I want to exhaust other options first before commiting to such a venture.


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