Monitor died. Should I even try to fix it?

[Mark Healey]

As I turned on my main computer yesterday there was a loud pop and
nothing. I'm assuming that big cap failed. With no schematics I'm
assuming that the only problem I will be able to find is the blown up cap.

What are the chances that the cap just failed or or that something, not
detectable visually, caused the cap to fail?

Should I even bother trying to fix it? It is a real nice Iiyama,

 

[Tim Williams]

What are the chances that the cap just failed or or that something, not
detectable visually, caused the cap to fail?

Considering the stress on the cap (switching power supply), if it were
somewhat defective it certainly could've blown on its own.

Usually capacitors go in the first three months though, don't they?

In any case, it seems to me if the capacitor is the only thing dead (like,
the rectifier isn't half shorted), it might've died on its own. Be very
careful inside a monitor! The main cap usually has 320V or so, and there
are 100V and 20,000V circuits elsewhere inside that case.

Tim

 

[Deefoo]

As I turned on my main computer yesterday there was a loud pop and
nothing. I'm assuming that big cap failed. With no schematics I'm
assuming that the only problem I will be able to find is the blown up cap.

What are the chances that the cap just failed or or that something, not
detectable visually, caused the cap to fail?

Should I even bother trying to fix it? It is a real nice Iiyama,

Some while ago I had a similar problem with a 10 year old 17" Iiyama, dead
on power on (no pops though). I rushed out to buy a new monitor (19"
Philips) and then decided to take a look at the old one. No schematics
either. When poking around in it I kind of accidentally came across a
resistor that turned out to be open. Replaced it with a scrap one and the
monitor has been working since. So yes, it may be worth it.

Good luck,
--DF

 

[Chris]

As I turned on my main computer yesterday there was a loud pop and
nothing. I'm assuming that big cap failed. With no schematics I'm
assuming that the only problem I will be able to find is the blown up cap.

What are the chances that the cap just failed or or that something, not
detectable visually, caused the cap to fail?

Should I even bother trying to fix it? It is a real nice Iiyama,

Hi, Mark. Unless you have experience in working with high voltage, it
might be better to just let it go. The high voltage circuitry can have
kilovolts of charge stored on the high voltage caps for up to days or
weeks after it's turned off. It can be a little hazardous, and unless
you know what you're doing, you could geet a rude awakening.

If you do have some experience with monitors or television repair, you
might want to repost to sci.electronics.repair. Be sure to give the
monitor model number.

Good luck
Chris

 

[Charles Schuler]

Should I even bother trying to fix it? It is a real nice Iiyama,

That depends on your knowledge. Have you repaired similar items before? Do
you know the safety rules?

 

[Michael A. Terrell]

Considering the stress on the cap (switching power supply), if it were
somewhat defective it certainly could've blown on its own.

Usually capacitors go in the first three months though, don't they?

Where do you come up with this stuff?



--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Tim Williams]

Where do you come up with this stuff?

Sorry, let me qualify that: when faulty, or connected wrong. I seem to
remember reading something like that. Like for instance, those motherboards
with crappy electrolytics that were dying pretty reliably in 3-6 mo's I
think.

Tim

 

[Mark Healey]

That depends on your knowledge. Have you repaired similar items before? Do
you know the safety rules?

I was an ET in the Navy. Did PPIs (and got bit once) so...Yes, but It's
been close to twenty years (shit, I'm getting on).

 

[Charles Schuler]

I was an ET in the Navy. Did PPIs (and got bit once) so...Yes, but It's
been close to twenty years (shit, I'm getting on).

Well, then do a visual inspection. Capacitors that go POP most often leave
clues ... debris, gunky electrolyte, bulged case, funky odor, etc.