CRT - Charge

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Does anybody know how much charge a VDU monitor contains after it is disconnected from the mains?

My neighbour wants me to have a look at it, to find out why it's always flickering. I'm not sure about poking around the back of CRT's?

I was told they hold a certain amount of charge like TV's do?

Any idea's?

Monkey

 

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They are exactly like TVs. The EHT is around 25kV, and a substantial amount of this remains a surprising time after switch-off. As an ex-TV engineer I would *strongly* suggest that if you don't know in detail about such things *DON'T TAKE THE BACK OFF ONE*!

Sorry to shout at you Monkey, but I like your style and wouldn't want to see you disappear in such tragic fashion.

Harry.

 

Incidentaly - most cases of flickering I've seen were due to a dodgy VGA lead - this gets lots of flexing and faults develop there usualy.

Harry.

 

Thanks Harry and AJ

I didn't feel like getting a new spikey hair style just yet!

The monitor is an old 17" CRT by Time computers. I'm not sure if this company still exist? I have just changed the leads over and yes as Harry states it's a dodgy lead.

But...the screen still turns pink after about 10 minutes?

Hmmm I wonder if it's worth sending to a specialist to repair or buy a revamped VGA?

Monkey

 

wouldn't it be better just getting a new monitor?

 

It would be, however some people can't afford it Cheek.
They rather go the cheap and chearful way than spend some dosh on quality gear

Beats me??
I've had my Technics Hifi for almost 9 years now. I've never had any problems yet my neighbour has gone through loads of cheap Hifi's such as Alba or saisho. He just doesn't learn. If it's got flashing LED's on it and cost £50 he will buy it!

Monkey

 

he's one of them dudes... have you told him the pros of having a newer one?

edit: hhere

 

The repair charge will be higher than buying a refurb screen. At the fairs these are going for about £20 these days.

Harry.

 

Cheers Mate

 

What would be the point? He doesn't even wear proper trousers

 

What about apple macs?

Aren't they CRT?

Also don't they have the MB and bits inside the VDU casing?

What if I was to wear some rubber gloves?
I mean besides getting a little excited wouldn't this stop the charge going through my body?

Then again it's an old Monitor :hhhmmm

 

I wouldn't risk it. There are other voltages inside a CRT - but the components don't go round waving screwdrivers and hands about, so their placing keeps them safe.

Harry.

 

Ok Harry enough said I will my neighbour to buy another and if he argues I will tell him to shove it!

Monkey