Question about Mag Innovision LT782S 17" Flat Panel LCD Monitor

1 Answer

Mag lt782s power board problems

Hey. I have a lt782s (700p) that has the symptom they when the monitor is powered on, the light flashes on the front. After disassemble I find no blown caps, but what I do find is two "burn" spots on the component side of the board. This indicates that the components on the back have heated up. Flipping the board over I find chips at location U101, U105, and U102, (all 8 pin surface mount) and The solder joints look terrible. I do not know what type of chips they are as the top etch is unreadable. Any one have a schematic on this board? Or any advice. I am fairly proficient at this so please no jibs about leaving it to the pros....

Posted by on

  • Anonymous Dec 20, 2007

    Burn on power supply board. Looks like one of the relays!



1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 4 Answers

Is it a really fast blink on the power light? If so, you might be looking at the wrong item. The fast blink means that the mainboard has an issue.

Like I've said sever other times on this board, there's an NPN transistor that is usually the culprit. Just yank it and replace it with a Radio Shack NPN and you should be in business (maybe bump it up a touch so that you don't have the same problem again).

Posted on Nov 18, 2007


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Mag monitor lt782s - green light on screen black

This means that the power supply board has a problem. The problem is that the part of the circuit that controls the backlight has failed. This is usually caused by capacitors that have gone bad or transistors that have shorted.

Dec 23, 2010 | Mag Innovision LT782S 17" Flat Panel LCD...

1 Answer

PL 9 19" CRT Monitor: my mag innovision lt716s 700p monitor screen keeps...


The picture board on your monitor is bad, since it goes off after few seconds and the power led or button is on, it means the picture board of your monitor has developed fault.

The best thing for you to do now is to take the monitor to a local repairer or service center within your vicinity to help with the replacement of the picture board because the fault is not something you can fix yourself, in order not to complicate issues.

Take care.

May 06, 2010 | CTX PL 9 19" CRT Monitor

2 Answers

No power with 700P LCD monitor, No green light, nothing. replaced 2 popped 470 25C caps. Nothing else looks bad. Board 860-ALZ-M713-F

You will need to check for any pico fuses that run along those capacitor lines they may be marked as pf or nf on the pcb

Jan 03, 2010 | Mag Innovision LT776s 17" LCD Monitor

2 Answers

Cant get mag 700p monitor to work with toshiba satellite


Oct 30, 2009 | Computers & Internet

1 Answer

Screen goes black after a few seconds.

when the screen goes black shine a flashlight on it. If you see a dim image the back light needs to be replaced. Otherwise check the inverter as that may be causing the problem as well.

Sep 07, 2009 | Mag Innovision LT782S 17" Flat Panel LCD...

1 Answer

MAG 700P monitor display goes black after 60 seconds


Can you send pictures of the power board to me at I will check our service manuals for the model and get back with you about a solution.

Corporate Computer

Jun 29, 2009 | Mag Innovision LT782S 17" Flat Panel LCD...

1 Answer

Black screen monitor

souns like the dc-dc convertor board that supplies the backlight gone faulty possible poor soldering on board

Oct 07, 2008 | Mag Innovision LT782S 17" Flat Panel LCD...

2 Answers

Green led light flashing on 700p proview flat panel and no picture

I have a similar problem.
Switching the screen off (front panel button) and on again after waiting a few seconds fixes it.
This is a recent problem, so I'm expecting it to get worse and worse until one day!!!!!!

Oct 03, 2008 | Hanns.G Corporation JW-199DPB 19" LCD...

1 Answer

Mag lcd monitor

probably capacytor problem in the mainboard, take it to the lab it will be cheaper then buying new one

May 06, 2008 | Mag Innovision LT782S 17" Flat Panel LCD...

1 Answer

Monitor took half an hour to warm up, now won't start.

doubtful this is a driver issue warm up is not needed for any monitor. this is a power board issue internal to the monitor capacitors or some issue on the main power board. let me kow what you will do. good luck.

Nov 18, 2007 | Mag Innovision LT782S 17" Flat Panel LCD...

Not finding what you are looking for?
Mag Innovision LT782S 17" Flat Panel LCD Monitor Logo

411 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mag Innovision Computers & Internet Experts

William Miller
William Miller

Level 3 Expert

9098 Answers

Rommel Balcita

Level 3 Expert

749 Answers


Level 3 Expert

2600 Answers

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

Answer questions

Manuals & User Guides