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Dudes:
My surge protection saved the computer but not the monitor, I'm wondering if there's a fuse in there?
It's made by KDS (Korean).
If there's no fuse what damage can I expect? If the likely component is relativelyu cheap I'd consider busting it open and replacing just that component.
Thanks - rev
Yes most likely there is a fuse. Be sure it's unplugged!!! and crack it open. Look close to where the power cord connects for a mini fuse (small glass fuse). It should be in a clip holder, pop it out, inspect it close and hopefully it's blown and a replacement of the EXACT amperage will get you going again.
No sign of life at all?
Hmm........lots of high voltage inside the monitor even when off for days,not recommended for the amateur.
Yes there should be a fuse that looks like an automotive fuse. It could be soldered in. Worth taking the case off and look. Just be careful removing as there may be a data cable or electrical cables attached to the case.
If a power surge hit the monitor, your probably screwed. Your low voltage could be blown and quite frankly with the price of monitors it isn't worth fixing. How old could be under warranty???
I have 2 KDS monitors,but have never had a reason to open one. If it's less than a year old,the warranty will let them cross ship you a replacement with just a credit card no. for backup.Full warranty is 3 years,so if it falls in that time frame i'd get hold of KDS before opening(which will probably void warranty)...
Can you recognize a capacitor? If not, you might want to leave that case closed. A capacitor will store voltage, somtimes at deadly levels.
To answer your question, yes, there should be a fuse. If it's a normal glass clip in fuse (like in old cars) just go ahead and change it. It might be soldered in, but don't assume it's a fuse unless it's labeled "f-u-s-e"
Dudes:
Thank you all for your 2c! I know a fuse when I see one and the thing has been unplugged for a week so there won't be any voltage left in there now.
I'll give it a shot.
Thanks - rev
read here http://an.hitchcock.org/repairfaq/RE...tml#MONFAQ_013Quote:
the thing has been unplugged for a week so there won't be any voltage left in there now.
Quote:
2.11) Monitor repair
Unlike PC system boards where any disasters are likely to only affect
your pocketbook, monitors can be very dangerous. Read, understand, and
follow the set of safety guidelines provided later in this document
whenever working on TVs, monitors, or other similar high voltage equipment.
If you do go inside, beware: line voltage (on large caps) and high voltage
(on CRT) for long after the plug is pulled. There is the added danger of
CRT implosion for carelessly dropped tools and often sharp sheetmetal
shields which can injure if you should have a reflex reaction upon touching
something you should not touch. In inside of a TV or monitor is no place
for the careless or naive.
Having said that, a basic knowledge of how a monitor works and what can
go wrong can be of great value even if you do not attempt the repair yourself.
It will enable you to intelligently deal with the service technician. You
will be more likely to be able to recognize if you are being taken for a ride
by a dishonest or just plain incompetent repair center. For example, a
faulty picture tube CANNOT be the cause of a color monitor only displaying
in black-and-white (this is probably a software or compatibility problem).
The majority of consumers - and computer professionals - may not know even
this simple fact.
This document will provide you with the knowledge to deal with a large
percentage of the problems you are likely to encounter with your monitors.
It will enable you to diagnose problems and in many cases, correct them
as well. With minor exceptions, specific manufacturers and models
will not be covered as there are so many variations that such a treatment would
require a huge and very detailed text. Rather, the most common problems
will be addressed and enough basic principles of operation will be provided
to enable you to narrow the problem down and likely determine a course of
action for repair. In many cases, you will be able to do what is required
for a fraction of the cost that would be charged by a repair center.
Should you still not be able to find a solution, you will have learned a great
deal and be able to ask appropriate questions and supply relevant information
if you decide to post to sci.electronics.repair. It will also be easier to do
further research using a repair text such as the ones listed at the end of
this document. In any case, you will have the satisfaction of knowing you
did as much as you could before taking it in for professional repair.
With your new-found knowledge, you will have the upper hand and will not
easily be snowed by a dishonest or incompetent technician.
--------------------------------------------------------------------------------
Dude:
Thanks. I now feel honor bound to stick my fingers into every nook and cranny.
My first problem is getting inside it - I see no way in and I fear it was made the way ships are made in bottles.
Is there no way to discharge any charge that might still be loitering in the pixels?
rev
If I remember rightly [ I might well be wrong ] there are usually several screws under the support leg [I`m not picking my 19" up to look either,to darn heavy !! ;) ]the back then should slide away to the rear exposing the metal faraday cage around the internals.
Ah the faraday cage - how silly of me! I hope faraday is no longer in there.
Maybe I could get the rubber mat from my car and stand it on while I work - that way if it's a shocking experience the shock will only reach my feet.
This is like banking, the charges linger long after the overdraught.
rev
All joking aside, Rev, standing on a rubber mat is a fine idea. I'm an electrician and I deal with some serious voltages on a daily basis. Insulation is what it's all about. Standing on a rubber mat is good - the other thing to do is to only prod at things with one hand, keeping the other clear of everything else. I tell you this from personal experience - if you have one hand earthed (grounded in American) and the other touching a live conductor it goes staight across your heart, and it hurts , apart from anything else. You do get used to it eventually, though if that's any consolation :D
Yes but it still makes you swear like a trooper :DQuote:
You do get used to it eventually
I've found that while voltage is bad, frequency is where the real pain is at.... Try getting hit with 115V 600Hz sometime- I'd rather take 220V 50Hz anyday.
Kinda makes your whole body stingle (that's sting & tingle)
:)
I agree that monitor repair is left to a professional but replacing a blown fuse can be tackled by an amateur that has some common sense, a bit of knowledge and respect. The capacitors on the circuit board normally bleed off when powered down, the only real danger, and the one everyone warns against is the crt, it holds a charge similar to a capacitor, and that voltage is about 30Kv. I've gotten the blast from it while a tv was running and also when not. When it's not running it's like a big blast of static and when running, well....now that hurts.
So when inside, dont get the urge to stick anything under that rubber cap up high on the crt....if you cant resist, then enjoy the feeling of a short blast of high voltage as it surges through your arm.
Dudes:
If I suddenly stoip posting you'll know I've been fried.
As a 4 year old kid I didn't believe what I was told about electricity and I made a 'daisy chain' out of all the cutlery in the draw and stuck the last fork in the wall outlet, turned it on, then I went and touched the other end.
They were right.
rev
I was maybe seven or eight when I watched my dad light one monitor up in flames when he was disassembling it. There were about a dozen total and on one he just got 'lucky'. Fortunately we still have him, but the monitor couldn't be saved.
Personally I would try to fix it myself, too. Shadow1 is right about the rubber cap; however, the daring could ground the tube to the case and discharge the CRT.
You'll probably have to be comfortable with a soldering iron to get a fuse in and out of there. Look around the boards near the PS to look for singeing. If other components went, too, then all is lost.
What a cheery soul! I think I'll go in head first.
Hey Reverend. I noticed you haven't posted anything since Wednesday. I hope we can get back to sending posts without having to send you a get-well card. It will be nice to know how things turned out.
Professor Dude!
Nice to know I'm missed - or were you just trying to find out if I was dead?
I've been temporarily scared off by the horror stories about dismantling a monitor, mine probably has a boxing glove on a spring inside it too.
I don't want to be discovered by aliens in 100 years with my fried finger still stuck in the faraday cage - like that dutch kid who stuck his finger in a dyke.
(Moderators - by 'dyke' I mean a water retaining wall)
I'll get dressed up in a wet suit and stand on someone I don't like before I have a shot at it - the monitor that is.
rev
LOL this has been a most amusing thread.Quote:
Originally posted by Reverend
Professor Dude!
Nice to know I'm missed - or were you just trying to find out if I was dead?
I've been temporarily scared off by the horror stories about dismantling a monitor, mine probably has a boxing glove on a spring inside it too.
I don't want to be discovered by aliens in 100 years with my fried finger still stuck in the faraday cage - like that dutch kid who stuck his finger in a dyke.
(Moderators - by 'dyke' I mean a water retaining wall)
I'll get dressed up in a wet suit and stand on someone I don't like before I have a shot at it - the monitor that is.
rev
Reminds me of the time I decided to re-wire a light switch........at night time so didn't turn power off or I wouldn't have been able to see.
Removed screws and pulled out from the wall - was moving wires and accidentally touched the wrong two with my fingers.
Hmm that tingling feeling only has to be felt for a few seconds before sensibility kick in.
Needless to say I'm not an electrician for my job.
Reverend, dont forget to wear your marigolds [washing gloves]and connect yourself to the nearest lightning rod ...........OH! and have an extingusher close to hand just in case ;)
Hope it all works out for you after all this input :)
Never mind you live and learn,it could have been worse you could have been using the light to see what you were doing :)Quote:
accidentally touched the wrong two with my fingers.
Dudes:
An update. I found out that there is a fuse in this type of monitor from the KDS website, I bought the fuse for a dollar and put it in.
My monitor works again.
There was nothing to it, no Faraday, no Rosenbaums, no head of a man in his late 50's nothing. Not a suasage.
rev
The lord must have been smiling on you reverend.
Dude:
Yeah. I did dress up as suggested though, nothing orthopedic (and nothing tacky) just a wet suit, the rubber mat from car and the marigolds.
I was hoping the Jehovah's witnesses would call while I was thus attired - I felt sure it would be the last time they visited.
I wrote a will and let the dog out to fend for himself in case I lit up.
What's black and hangs from the ceiling? - a polish electrician.
This screen seems extremely large after the 14" I put up while I was down - 'just until I wear glasses'
rev
So how do I discharge a capacitor?
I always used a jumper and ground that cap.
I've took one out of a microwave before. So what is the proper procedure?
Well, that'll do it, but you can make some capacitors go bang doing that, as well as producing a spectacular spark :D The best way is to put a fairly high value resistor in series with the grounding lead and let the capacitor discharge at a more reasonable rate.
Dudes:
Don't worry about any of that!
Dress up!
rev
Hi,Great another mystery solved, we thought it was a UFO but NO, it was the Reverend in his wet suit standing on a rubber mat, fully charged and blazing across the night sky!:)
That was Faraday and the Rosenbaums!
While it's a wonderful thing that we helped the Reverend get his monitor working, I'm concerned that we may also have given him a rubber fetish:
I have visions of the Rev furtively visiting Californian Scuba diving emporia and drooling over the wetsuits :D :DQuote:
Dudes:
Don't worry about any of that!
Dress up!
rev
What can we do to return him to normal?
Get the whipping post out and tan his b***side !Quote:
Originally posted by SuperSparks
What can we do to return him to normal? [/B]
No hang on,that may make it worse :rolleyes: :D
Dudes:
Thanks for your concerns but opportunity has knocked.
I'll put my underwear on the outside and go into business as a monitor repair superhero - since I'm all dressed up.
$1 for the fuse and $100 an hour for the ridicule.
BTW that mat I stood on from car was not exactly anti-static! I think I was at greater risk from the mat than the monitor.
rev