Tip & How-To about Mag Innovision LT776s 17" LCD Monitor

Setup Menu for MAG LT776 Model 780

I had a blank screen and went through the Setup tips here (in the blind) only to discover it was 3 bad caps on the PCB. I replaced them (tight fit) with more low-profile ones. They were swollen only, not burst or leaking. I put new 220uf 16V ones in, got my screen back.

I realized that it would be helpful if there were an image available for anyone troubleshooting, especially if not familiar with this model, or it's setup. I made the following image, maybe it will help someone in the future.



I see the image is resized for the forum, here is a link to a full size (700 x 850) viewing.

Full size Setup Screen


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1 Answer

Hello!Sony SDM-HS73 power-inverter problem


At this point you may have bad transformers, bad tuning cap, you need to check the frequency of the inverter oscillator to see if both of them are running at the same frequency, the bad one may not be. The Inverter/power supply is not made by SONY, Powernet makes the board. Please see what went wrong with the one I fixed.
http://s807.photobucket.com/albums/yy352/budm/Sony%20SDM-HS73/
One thing to keep in mind, when the board turn into carbon (blacken), it will conduct. The circuits operate at high voltage and high frequency.

Apr 09, 2010 | Sony SDM-HS73/H (Grey) Monitor

1 Answer

Vertical blanking


CHECK C2C52 10 UFD @ 50 V OFF THE BASE OF Q2C51 ON THE SIGNAL PCB. 2. CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB.

Dec 06, 2007 | Mitsubishi VS-60705 60" Rear Projection...

1 Answer

powers up, screen visible for about 3 seconds then goes blank.


There are two versions of the power supply/inverter PCB assembly, you need to look inside to see if it has any bad caps with bulging tops first, then post back so we can guide you further.

http://lcdrepair.us/1504fp-inverter-power.html

http://lcdrepair.us/1504fp-power.html

Feb 18, 2010 | Dell UltraSharp 1504FP Monitor

2 Answers

The screen is all white


You need to re-seat replace the ribbon cable that is connecting screen to main board. Possibly out place after unit was dropped.

Sep 07, 2009 | Sony Ericsson K510i Cellular Phone

2 Answers

mitsubishi HD1080


Good Day;

You may have a bad lamp. What lights show on front panel? Check this when no come on:

1. Red status LED, self-diagnosis error 44, check for open F9A06 on the Power PCB part # 283P128050 on the Power PCB 2. Red lamp LED, self diagnosis error 34. Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if missing replace the Power PCB part # 930B921002 3. LED stops blinking after 70 seconds of plug in but will not power on. This model is equipped with a keyboard lock feature, this can be mistaken as a no power condition. To unlock the keyboard press and hold the "menu" button on the front panel for 10 seconds 4. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector LE pin 3 and 4 on the Control PCB, if low suspect problems with the switches/buttons on the Control PCB part # 935D776001 5. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector LE pin 3 and 4 check good. Suspect the E2P PCB part # 934C121001 6. (LED does not stop blinking after plug in) Disconnect the USB connector from the card reader to the front from the Chassis, if the LED stops blinking after 70 seconds replace the Card Reader part # 299P271010. 7. (LED does not stop blinking after plug in) Disconnecting the USB connector from the Card Reader did not help. Remove connector FC from the FMT PCB and plug the unit in, if the LED stops blinking after 70 seconds with FC removed suspect a problem on the FMT PCB (part # 930B924002), if the LED keeps blinking with connector FC removed suspect a problem on the DM PCB (part # 934C116002). 8. (LED does not stop blinking after plug in) On the DM PCB (part # 934C116002) check C81A2, C81A3, C81B3 and C81B4 (1000 UFD, 16V, 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C). See Service Tip VS-78A 9. (LED does not stop blinking after plug in) On the FMT PCB (part # 930B924002) check C8F19, C8F21, C8F22, and C8F27 (16V 1000 UFD 105C), if any are bad, replace all of them with part # 181P734030 (680 uFD, 16V, 105C) See Service Tip VS-78A .

Good Luck, big IRISH.

Sep 10, 2008 | Mitsubishi WD-52525 52" Rear Projection...

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