Question about Mitsubishi LT37131 37 in. HDTV LCD Television

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My Mitsubishi LT-37131 was damaged when my electrical circuit lost the neutral wire. The voltage going to the tv was 250 volts between the hot and the neutral. The tv will not turn on and it it doesn't even have a power available light. I did look inside and verified that the glass fuse is good. Which board would you suspect is damaged?

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It should have MOV (130~150V rating) across the Line and Neutral after the fuse, unless this TV was made to work from 100~240v range. You should check to see if the 5vdc standby is evev working right now, withot it, nothing else will happen. Checkt the DC voltage on the large electrolytic cap (the one with 150~300uF 350~450VDC rating) in the AC primary side, it should be connected to the bridge rectifier, it should have around 160vdc (120v x 1.414) on it.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

Please post back what you find.

Posted on Nov 07, 2010

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http://www.shopjimmy.com/mitsubishi-lt-37131

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