Calling all Monitor techs!!!! I need Help

[XenonOU812]

I have a mitsubishi 21 inch monitor its about 5 years old I think its a dimondscan 21X something. When I turned it on this morning I saw a flash and a white dote that was kinda circling around in the center of my screen. Now all it make is kinda a soft tambourine type rattle. Is this worth bring into the shop or is my monitor beyond hope



PLEASE HELP ME!!!

Xenon

 

[Oyeve]

Monitor repairs can be extremely expensive. See if you can get a free quote from somewhere.

 

[flippo]

Sometimes the price for fixing old monitor is more than buying a new one.
I once remember replacing Main Deflection Board for the old Apple monitor and it costs the owner about 350 dollar (but hey he still want to fixed it even I suggest to buy a new one would be cheaper).
There is two main expensive part for the monitor one is the CRT tube and the other is Main Deflection Board.
You could try Oyeve suggestion getting free quote first then compare with the ne monitor price you want to get.

 

[MC]

times to get a new one.....unless you know somebody at local computer shop..

 

[larrymoencurly]

Have you tried the Monitor Repair FAQ or asking in sci.electronics.repair?

Could that tamborine rattle actually be a wierd buzzing? Sounds like scan trouble, something that a TV repair book would cover. There's one big transistor to scan the picture horizontally and a big chip or pair of transistors to scan it vertically.

One thing you don't want to do is take it to a computer shop for repair! :disgust:

 

[nippyjun]

Could be a blown tube, which would cost much more then it's worth. Call a repair shop, tell them the symptoms and see if they think it's the tube as well.

 

[Mem]

5 years old, you are better buying a new one since Monitors have come a long way since then in Image quality etc.

 

[jamarno]

It's not the picture tube unless the flash came from its neck. A deflection problem is a good guess, but it's not the vertical because that would cause you to see either half a picture or just a thin horizontal line. Since the picture went dark, it's the horizontal because it's not only responsible for sweeping the electron beam left to right but also for generating several voltages, including the 25,000V needed to see a picture. If it's not simply a shorted horizontal output transistor (HOT), then there could be a bad damper diode as well (but many are now built into the HOT), or the flyback transformer could have shorted its voltage multiplier.

Sometimes you can fix these things cheaply yourself, but HOTs for some monitors, especially large ones, cost over $50.