Question about Mag Innovision LT776s 17" LCD Monitor

1 Answer

Does a bad power supply look like this?

My Mag LT776s is several years old. The display is is normal for 5 mins or so, then the screen goes black. The power button led goes from green to amber. If I power off and on I get a normal display that shuts down after a minute or two. Hit the off/on switch again and I get a 30 second display before the screen goes black. Would an overheated power supply do this? I hate to shell out $30 for a new power supply and then find out some other chip or board is faulty instead.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 56 Answers
Re: Does a bad power supply look like this?

I suggest that you buy a new monitor coz your current monitor is too old...there's some electric component is weaken...its better to buy new than to repair the old one..

Posted on Jan 28, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

2 Answers

Power supply to Mag 780 Model

No, it has a normal, seperate power cord. But the socket in the monitor is very small, it's a small round one. When facing the monitor from the back, it's located directly to the right of the monitor-stand, at the bottom-side of the screen. Just put the monitor on it's side to see it clearly.

It's all explained with pictures in your monitor's manual which you can download from the official website here:

Aug 23, 2009 | Mag Innovision LT776s 17" LCD Monitor

4 Answers

Screen goes blank after being on several seconds

Is the green light on (still indicationg power? Ist put your ear to it and switch on - hear any buzzing? Most like the HV Fluro Inverter for the lamps has an issue. For some the 2SC5707 may have gone - common.

May 29, 2009 | Mag Innovision LT776s 17" LCD Monitor

2 Answers

MAG Innovision LT2219WDB monitor will turn on -picture up clear as ever and 2 seconds screen goes black, turn it on and off screen comes up clear as always and 2 seconds goes black. will not keep the...

I have the same problem with a customer's monitor (LT716S); it turned out to be damaged power supply board. As I understand it, MAG has a 3 year warranty on parts, will probably charge you a flat labor fee plus shipping. If you do not have your purchase documentation for warranty, dump it and replace. If you can, then you may wish to have it repaired.

My customer replaced theirs; I am trying to purchase replacement parts to repair...good luck.

Feb 24, 2009 | Computer Monitors

1 Answer

MAG LT776s Monitor power cord


Your description is the external power supply/adapter for a Mag Innovision LT776s 17 in. Flat Panel LCD Monitor. One may be purchased here. Aftermarket/replacements may be found here, here or here. Pls verify that the plug matches the jack and the polarity is correct. Additionally, if it would be a replacement, pls check the voltage and current rating.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Oct 10, 2008 | Mag Innovision LT776s 17" LCD Monitor

1 Answer

Monitor Goes Black

There are defect at the main board.
Try checking the capacitors.

Apr 24, 2008 | Mag Innovision LT776s 17" LCD Monitor

1 Answer


Check and make sure that the speakers and any power supply (UPS) are not placed very close to the monitor.

Feb 11, 2008 | Mag Innovision LT776s 17" LCD Monitor

1 Answer

Mag Innovision LT776s Model 780

Sounds like an inverter problem. If the power supply is internal replace the capacitors coming out of the voltage regulators. These are usually 1000mf and/or 470mf. If that doesn't do the trick look up the numbers on the 8-pin chips that drive the secondary transformers on the inverter to see if they are getting the right voltages.
Good Luck!

Nov 23, 2007 | Mag Innovision LT776s 17" LCD Monitor

1 Answer

Mag LT776S Monitor (Screen turns black)

This is not quite clear. You say no image at home or at school but worked at the store Did you see it working at the store? Check the cord sonnector for bent pins and or replace the cord- then come back

May 16, 2007 | Mag Innovision LT776s 17" LCD Monitor

3 Answers

Mag Innovision LT776s 17 in. Flat Panel LCD

I have the same problem except it usually happens after Ive left my computer idle for a while... i.e . Overnight, I usually turn off the monitor and I hit the button after I come back to turn it on. I get the same flashing light for several minutes. This has been a problem for several months, but only recenly have i gotten the same error message you mentioned. Each time ive booted the computer up cold or restarted it has worked fine but this time it took longer along with displaying the message: Top Left to Right: SH770 P001 Bottom Left to Right: AU M170EN05 Anyone else who can clear this up?

Mar 04, 2007 | Mag Innovision LT776s 17" LCD Monitor

Not finding what you are looking for?
Mag Innovision LT776s 17" LCD Monitor Logo

183 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mag Innovision Computer Monitors Experts

William Miller
William Miller

Level 3 Expert

8795 Answers


Level 3 Expert

2598 Answers

Are you a Mag Innovision Computer Monitor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides