Question about Toshiba MD20F51 20 in. TV/DVD Combo

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Power problem TV turns off for no reason-can't get the power to stay on. Worked fine yesterday and the previous two years.

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A common failure in these units is Q401, Toshiba p/n# Bz510004 is a 2SA1624 (HV amplifier) which finally fails due to a resistor R408 Toshiba p/n# Bz210285 a .47 ohm/1w metal oxide having changed in value and at last opening...
This isn't an expensive repair for a qualified shop - but I would suggest not continuing to test your shutdown circuit. What's happening is that HV (high Voltage) is builds beyond tolerances and the shutdown circuit turns your unit off to keep from causing any severe damage. If it failed you could likely burn out the SMPS or cause some substantial damage..
Good Luck!
Bill

Posted on Dec 01, 2007

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Posted on Jan 02, 2017

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