I have a Matrox G550 video card.
Two monitors. Set up as 1600 X 600.
Left the house last night with system on.
Thunder storms in area. Of three digital clocks, one was flashing. All three flash is power goes down for only a couple seconds. So "glitch" must not have been [apparently] much.
My right hand monitor is dead. The power LED won't come on. System is fine, including left monitor. Reset to 800 X 600 so I can see everything.
Question is, what can I look for when I open the case? Could there be a reverse biased diode somewhere? Would I look for a fuse? Is it likely just dead?
Monitor is a HP, 4 years old. DID work good. It came with an HP Pavilion 6330.
I'll be looking into it Wednesday. ( :( first opportunity) Hopefull some answers/further questions by then?

Thanks, Issachar

Hi issichar

I know you are going to get this reply, so I thought I would start it off. Only if there is some type of reset button or circuit breaker on the outside of the monitor, is there hope. It is definately not recommended that you open up a monitor.
There are extremely high voltages inside that can last a very long time even after the monitor is unplugged.
Unless you are a tech that is very familiar with how monitors work- A new monitor is better than no life.
It can literally be a very schocking experience!!!:eek:

I agree fully with that...components inside a monitor hold electrical charges of up to 30,000 volts for up to several months after being unplugged.

Try the monitor in question on a different computer and try a different monitor on the output it uses on the computer. That should prove or disprove that the monitor is the problem.

If another monitor will not work on the same video output then the video card is suspect.

I totally appreciate the warning on inside the monitor. I did do TV repair for a few years in the seventies and am aware. Thanks though.

I have never worked on a monitor though and didn't know what to expect other than the actual CRT and associated electronics/voltages.

I guess one thing I don't know [among many things:)] is whether or not the power LED will come on in the absence of a signal? In other words, can I just plug in the AC for a monitor and expect the LED to come on? If yes, then I am suspecting the monitor is what is bad.

If that is true, that is where I am in asking about what sort of input protection I might expect to find/look for. I'll be with no schematic. I do have a scope, vom, etc. so any suggestions will continue to be much appreciated.

Issachar

Hi again Issachar

I assume you have already done this:

Try the monitor in question on a different computer and try a different monitor on the output it uses on the computer. That should prove or disprove that the monitor is the problem.
Keeping in mind that I certainly am not advocating that you attempt to fix it, HERE (http://www.repairfaq.org/REPAIR/F_monfaq.html) is a fairly extensive article you can check out that was in fact written around the time your monitor was manufactured.

I would pay particularly close attention to the chapter on safety!
Take care:)

Hi Issachar,

Being a T.V. tech myself and still in the business, electronics has change quite a bit, especially in power supplies. If a fuse, resistor should open up in the supply (usually they are now switch mode type) capacitors will hold a lethal charge. This as you know is the most dangerous section. Treat it with the respect that it deserves. However saying this the light should come on whether there is no signal or not.

______________________________

Ron