MS fault with 5977B

The EM Power Supply...is the 3000V power supply for the Electron Multiplier.  Please contact Agilent to discuss service options.

Contact Us | Agilent

Any part # for this power supply? How Can this electronic part died like that? We had temperature and humidity problems during the summer. Could it be that?

Electronics fail sometimes. Temperature and humidity can certainly play a factor.  The 3000V supply is part of the side board attached to the analyzer and the entire board is replaced.  This error really needs good troubleshooting as it could also be other parts. Please contact Agilent to discuss service options. Contact Us | Agilent

This is the message I got. It really says EM powersupply fault. Not knowing what it is I vented again the MS, put it off and the GC as well. 

the software don't even let me tune the MS. 

This MS it's only 2-3 years old on a GC 8890. 

Thank you for your help. 

I really appreciated. 

I also saw in the Agilent 5977B manual that for example ESD can degrade electronics gradually. Can we say the same about 70-80% Relative humidity laboratory? Because we have seen electronics failure at other instrument in the same laboratory. 

I also read that 80% or RH is supported by your installation specification but some service tech said that is a lot of water and can esasily have enough water at high temperature so it will enters into electronics part. 

We also had our triple quad collision cell died and it was only 2-3 years old as well. 

Have you ever heard problem like I just mentionned elsewhere when 60-80% RH were observed for weeks during summer? 

Thank you 

ESD happens faster when it's dry, think of static discharge walking around on carpet. The safe operating temperature and humidity ranges in the Site Prep guide are:

15 to 35 °C, 20 to 80 % relative humidity – noncondensing (operational) 
–40 °C to +70 °C, 0 to 95 % relative humidity – noncondensing (storage)

Noncondensing. If your 80% is leaving "dew" wetness on things that is bad.   Is it 80% RH inside your laboratory or outside and your laboratory's air conditioning is dehumidifying the air inside?

Most all electronic failures are caused by bad power - spikes, sags, brown-outs, and power outages - as there are frequently power spikes when it comes back on.  You might want to have a certified electrician check out the power from the panel all the way to the instruments.  Ground. Ground to Neutral. Dedicated circuit breakers with sufficient capacity, and maybe the electrician can put a monitor on to see if your building power is spiking and causing your issues.