Lexicon MC12HD won't power up.

I am working on a Lexicon MC12HD for a contractor who is a client of mine. The unit is out of warranty. The problem is that it will not power up. I looked inside and did not see any obvious fuses, although the power supply is not easy to see, and it is not clear how one would remove it to get a better look. Lexicon is very tight with support info. Anybody have any suggestions?

5 Related Answers

Veril Gillette

1126 Answers
Posted on Dec 20, 2010

SOURCE: Looking for a Power supply

If you change out the electrolytes caps on your power supply it will fix the problem, or you can buy a new one at www.partstore.com

matt martin

1259 Answers
Posted on Jun 18, 2011

SOURCE: AOC Envision L32w761 TV. Lightning

If you are certain you have a lightning surge, almost anything can take down your TV. First check the obvious, do you have power coming out of the wall. Is the surge protector good, if you used one? If you have answered yes to the these questions, you may have acquired a power surge in your TV. You may not find it in your TV. As I have said it may be anywhere in the TV. You will need to take this TV to an authorized service center. It would be difficult for anyone out side a technician to find the problem. Thanks for asking and show all hands of support!

Anonymous

1238 Answers
Posted on Aug 11, 2011

SOURCE: No power and no glow

Good day!!!

That problem is usually have 2 causes..Its either power supply board or mainboard..

Please take this steps on how to determine the problem:

Open the back cover.
Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter..
If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board..
If the power supply output is normal..The problem could be on the main board...
If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board..
If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV..

Hope thissolution will be helpful..

Thanks for using fixya...

Anonymous

1238 Answers
Posted on Aug 26, 2011

SOURCE: Helleo I've got a

Good day!!!!

That humming is not cause of main board..it is usually cause of faulty power supply board..

Please take this steps on how to determine the problem:
1. Open the back cover.
2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter..
3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board..
4. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board..

Hope this solution will be helpful..

Thanks for using fixya...

Sonny Berry

8617 Answers
Posted on Jul 09, 2012

SOURCE: Sanyo DP42647 tv won't turn on.

sanyo LCD tvs recieve the on command from the main board so chances are the main board was also damaged

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