Monitor blacks out after length of use (by 4 users)

I had the same problem, it turned out to be the power supply. Power supplies for this model are impossible to find.
I replaced the 5 bad capacators, works fine now.
You can visually tell which caps. are bad because they are domed on the top. Capacators should be flat on the top. Hope this helps.

Lou

how to open the case?

OK PEOPLE I GOT THE SOLUTION TO THE MAG INNOVISION LT916S GOING BLACK AFTER ANY LENGTH OF TIME BEING ON!!! I JUST REPAIRED MINE TODAY! THE PROBLEM IS THE CAPACITOR BANK IN THE POWER SUPPLY PART THERE ARE 6 CAPACITORS I HAD A FEW LEAKY ONES "NOT GOOD" THE CAPACITOR SPECS ARE AS FOLLOWS 470UF 25V 105 DEGREES C MEANING 470 MICRO FARAD/25 VOLTS I HAD A VERY HARD TIME FINDING THE 25 VOLT ONES SO I WENT WITH 470UF/35V 85 DEGREES C THEY MIGHT NOT LAST AS LONG AS THE OTHERS DUE TO THE TEMP RATING HOWEVER, IM THINKING SINCE THEY CAN HANDLE UP TO 35 VOLTS IT SHOULD EVEN OUT AND HEY, ITS WORKING SO FAR SO GOOD!! THE CAPACITORS ARE FROM UNDER A DOLLAR A PIECE TO A COUPLE BUCKS EACH. THE CAPACITORS HAVE A BOLD LINE RUNNING UP ON ONE SIDE INDICATING THE POLARITY. BOLD LINE SIDE IS "-" SIDE WITHOUT BOLD LINE ITS "+" THE POWER SUPPLY BOARD HAS THE POLARITYS STAMPED ON THE BOARD ITSELF UNDER EACH CAPACITOR. EASY 30 MINUTE FIX IF YOU ARE LEARY ABOUT SOILDERING, FIND A FRIEND THAT KNOWS HOW TO. ITS REALLY NOT THAT HARD THOUGH AND YOULL HAVE SOME DECENT ROOM TO WORK WITH. I PROMISE WHEN YOU OPEN IT UP YOU WILL ALMOST CERTAINLY SEE AT LEAST 4 OF THE 6 CAPACITORS BULDGING AT THE TOPS MAYBE EVEN LEAKING BROWNISH STUFF. DO YOURSELF A FAVOR THOUGH AND REPLACE ALL OF THEM WHILE YOUR IN THERE "THE SIX BIGGER ONES ONLY" IF ANY OF YOU NEED FURTHER HELP OR ANY OTHER QUESTIONS ABOUT THIS PROJECT PLEASE FEEL FREE TO EMAIL ME AT BTLEE26@HOTMAIL I DAMN NEAR WENT CRAZY TRYING TO FIND A SOLUTION ON HOW TO FIX THIS THING SINCE I SPENT OVER 300 BUCKS FOR IT NEW. AND IM BY NO MEANS A EXPERT WHEN IT COMES TO THIS STUFF BUT I DO KNOW A FEW THINGS. AS IM SURE MOST OF YOU DO. TAKE CARE YOU ALL AND THANKS TO THE GY WHO MENTIONED SOMETHING ABOUT CAPACITORS BEING BAD IN HIS!

Say if we were to tear it open, how would I go around to fixing it?

I follow the instructions and replace the capacitors with the same rating. However, the monitor still refuses to display.
I don't have experience in repairing electronics, so i ask my friend who repairs electronics for many years to take a look.
He said one of the inverter transformers is dead. I think he is quite good, since he shows me the oscilloscope waveform of the bad transformer.

Does anyone know where i can buy the inverter transformer?

Thanks BNUTZBCRAZY I also have a LT916S same fade to black problem. Replaced the 6, 470uf, 35V capacitors (Radio Shack #270-1030) as you suggested, still very early to tell, mine was a intermitent problem, but everything seems to be working fine. Thank you.

Well, first of all. Do not open it if you do not have any knowledge of what you are doing. Because it will probably make it worse.

Second, trying different monitor cables will not help either. I had the exact same problem, and I tried everything possible. After a while it stopped working all together. Showed the screen for one second and blacked out after that. No matter how long I let it be turned off.

You should probably hand it in to a repair shop or buy a new one. I did the same thing myself and ended up buying a new one.

You could also let the monitor stay on, the next time and never shut it off :P.

To:The Guest that this fix did not work for, make sure all of the capacitors are in correctly (polarity is important) and if any liquid leaked out of the base of the old capacitors and is on the board. The liquid that comes out of these capacitors is conductive and corrosive and will mimic the same problem if it is touching any of the leads on fresh capacitors. You can clean it off with a Q-tip and some alcohol, also check out DoofusOfTheD's last post, your problem could be the extra capacitor that he found.

I have the same problem and will be replacing the capacitors in the next few days. If it fixes my problem, cool, if not I will try to troubleshoot and post the fix.

To: BNUTZBCRAZY
About your post concerning the shop that wanted 49.00 labor and 12.00 for the capacitors, and you thought that it was a "ripoff" I don't know what you do for a living, but I'm sure you don't work for free.
I have worked in the repair industry for 25 years, and considering what that person has as far as overhead, the price he quoted is more than fair, considering you yourself said the monitor cost you "over 300 bucks"

That technician was actually doing you a favor, not one tech(myself included) likes to work on monitors that I have met, because they cannot make enough money on them fo pay their bills. Usually a repair shop has to charge about 40%-50% of the cost of a new unit to pay for the tech, supplies, insurance, licensing, electricity,advertising and a host of other charges just to repair you 300.00 monitor. Just be cause you told him what the fix was does not mean it will fix the problem, as the last guest on this forum will attest to. Not only that, if it did fix it and something completely different went wrong with it 30 days later, you would be knocking that technicians door down wanting him to fix it under warranty, thats why I would have charged you 125.00 for the job. The technicians in most all repair shops work on commission and they are expected to warranty their work for whatever the company policy is, and 99 times out of 100 if something else goes wrong with it and it is not related to the circuit that was repaired, the customer does not understand that something else inside that monitor could have gone bad, and now e have an irate customer on our hands over a $49.00 Labor charge and 6.00 profit on the capacitors for a grand total of $55.00 of which the tech only made less than $20.00 and most likely 15.00 for his work. and now he has to deal with a customer that thinks he broke it because he fixed it before.

To say that a repair on such an item for 49.00 plus 12.00 for the parts is a "ripoff " is a really unfair statement. If those capacitors had not been blatantly obvous that they were bad, you probably would not have been able to fix it and the 61.00 repair would have been a great deal for you, so try to be fair when you make statements like that. Electronics techs have to put in a lot of hours and put up with a lot of indignant customers to eek out a living and try to work on 20 types of products and over 100 different brands, so now that you know how things work, give em a break ehh.

BTW: Thanks for the fix, I have one of these (it's my personal monitor) and I have not had to work on this brand before, you saved me the time of pulling it apart twice.



Trialbyfire

Fabulous. I replaced those 6 capacitors and voila my MAG LCD is now working again! I did notice after I had purchased the capacitors and opened everything up there was another capacitor near the other 6 that was slightly bulging on top. Dang it, I would have bought one of those and replaced it also if I noticed it before buying the other capacitors. It is easy enough to open it all up again, and living in Atlanta know of a local shop that supplies capacitors. Let me give them a plug ACK Electronics - acksupply.com They also carried the exact replacement capacitor also - 470uf 25v 105 degrees - 78cents a piece.

You guys should all make sure you get the polarity of the capacitors correct when you replace them.

There is usually a black strip down one side of the capacitor, and a corresponding mark on the board where they mount.

Some times there will be a + to one side, this goes away from the strip on the capacitor.

If you get the polarity wrong, you could get some pretty strange results. You may "pop" the capacitor again.

waste of time. I did change all the capacitors and working alright. But turned off monitor at night and in the morning same problem. Waste monitor