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Fixing a Monitor

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Cluster

Member
Joined
Dec 5, 2001
Location
Canuckistan
I picked up a monitor the other day. It was in the local Bargain Finder as a freebie. We took it home and plugged it into the wall. The LED on the front turned green (it got power) then turned orange (standby i'm guessing). Then we took a venture to the computer, hooked it up, and still same thing. It doesn't get any kind of video signal but it does get power. How do i find out what's blown in it. Is it the tube, lasers, maybe the big capicitor in the back?

And another thing. Do i need to discharge the capacitor as long as i'm not stickin my fingers under the rubber, or should it be discharged anyway.

If i have to, how do i go about rigging something together to discharge it. Will using the ground on a wall socket plug work?
 

repo man11

Member
Joined
Dec 28, 2001
Be very careful! Quote from my A+ book"monitors contain circuits that require 35,00 volts with a high current. The voltage and current are stored on capcitors that do not discharge when the monitor is turned off or unplugged. Even after months of inactivity, the capacitors may have enough stored electrical energy to kill you." I would discharge any monitor I was going to take the case off of, first thing after removing the case. I have a book that describes the procedure, but it's at home. Anyone? Also it sounds like it may have a bad signal cable.
 
OP
C

Cluster

Member
Joined
Dec 5, 2001
Location
Canuckistan
repo man11 said:
Be very careful! Quote from my A+ book"monitors contain circuits that require 35,00 volts with a high current. The voltage and current are stored on capcitors that do not discharge when the monitor is turned off or unplugged. Even after months of inactivity, the capacitors may have enough stored electrical energy to kill you." I would discharge any monitor I was going to take the case off of, first thing after removing the case. I have a book that describes the procedure, but it's at home. Anyone? Also it sounds like it may have a bad signal cable.

I know that they have a high voltage. It's used by the lasers inside the monitor to put colors on the screen. There's a big capacitor in the back of the tube that holds the charge. It's got a big piece of rubber over it. I just need to know if i need to get a grounding tool, or can i get away with a piece of insulated wire plugged into the ground socket in my wall.

And how do i know if it's been discharged?
 

MadMan007

Magical Leopluridon Senior
Joined
Nov 28, 2001
Location
in a magical field
Glad to help. I foung this doing a simple google search for 'monitor repair' btw ;)

I was looking b/c I picked up a second-hand 19" monitor for like $80, but it had a slight ghosting in the image. It was only really moticable if you knew it was there, but I am anal about a perfect picture. Anyway, the FAQ said that could be caused by a poor signal along the cable, I replaced the cheap-*** cable with a nice triple-shielded one and voila! no more ghosting!