monitor discharging/cleaning

[tortois]

i have an occasional "arcing" of something inside
my monitor,it works but will goto blank screen
then i turn it off/on,come back on and is o.k.
its a HP M90,i'm hoping its static electricity
and nothing serious,degauss i know about.
i want to give it a good clean w/control cleaner
and discharge the monitor with the "ground to
anode" trick,...any tips on this? can you
clean without discharge?leave it unplugged
for a day enough?also the green/amber light
code thing i read about,there is a clicking
noise when it happens, any ideas?

 

[edfair]

If you have the tools and understand what you are doing you may be OK. Otherwise you may be dead.
You never assume that the monitor will drain on its own.
If you are going to work near the anode you should have it drained.
Ed Fair
Any advice I give is my best judgement based on my interpretation of the facts you supply. Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.

 

[hotfusion]

Sounds like you might understand a bit about EHT and the associated risks - what you describe could indeed be internal arcing, either over the EHT transformer or rectifier if separate. Usually it is initially caused by a build up of dust, which gets attracted to high voltage points at an unhealthy rate. The subsequent arcing then carbonises the plastic over which it is occurring, creating a slightly conductive path.
I have solved this in TVs in the past by a good clean, scoring out the 'tracking' if present, and spraying conformal coating over the affected areas.
You can identify the location of the discharge by observing in a dark room with the back off, and waiting for a discharge event.
Safety must be paramount - there are lethal voltages present, some high enough to arc a good 10mm, so keep hands clear, and do the final anode discharge bit before you touch the area. Also bear in mind the power supply elecrolytic capacitors can retain near-mains voltages for some time.
Personally I would identify the problem area one evening, switch off, and tackle the job the next morning.
Good luck. Andy.