Question about Toshiba TP50G90 50" Rear Projection Television

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TP50G90-screen will fade to black and then instantly power back on every 8 seconds

I have TP50G90. when powered on the set will run fine except that every eight seconds it fades to black as if it were being turned off and then will instantly power back on. during this effect the power light remains on and there is no break in the sound. any ideas. thanks,

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Power board problem needs a shop fix or new transformer without a test you cant tell.....

Posted on Aug 08, 2007

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Check to be sure there are no speaker wires touching ground, and that the wires are connected in phase to the head unit.
Front Speakers 5 1/4" Doors Left Front (+) Green Left Front (-) Black/White Right Front (+) White/Red Right Front (-) Black/White Rear Speakers 6" x 9" Rear Deck Left Rear (+) Pink/Red Left Rear (-) Pink/Blue Right Rear (+) Pink/Light Blue Right Rear (-) Green/Red

The symptoms you are relaying definately sound like an internal amplifier problem. It is fading in and out for a reason - usually due to heat.

Have you had the radio bench tested (seperate from the car) to eliminate the car as being the culprit?

Since the radio was run with damaged speakers originally, the output or amplifier power supply on the amplifier may be bad.

As an alternative to repairing, I would suggest investing in a small 2 channel amplifier to power the speakers.

The radios claim 50W per channel, but in reality give 12-15W RMS power.

A dedicated amplifier with built in crossovers and gain adjustments will prolong the life of your speakers and add to the tonal qualities of your new speakers. Instead of turning up the volume on the head Unit, and sending out a distorted signal that will blow your speakers, an amplifier will give more CLEAN power to them, so it will be louder at a lower volume setting.

This will bypass the internal amplifier on the radio, and send a Low Level signal ONLY thru a set of RCA cables.

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sounds like something in the standby voltages most likely a regulator or leaky diode causing the problem.

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I had the same problems as almost all of these people and the answer seems to be that I uninstall the current Nvidia Drivers and use a previous set. The 169.28 were a real problem for me. Just when I thought it was working I would get the strange wash out and I could not turn it off except with the back power switch, aslo using the DVI turns off all the on screen controls.

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Hi,

First, are you sure you have the correct power supply?

Also, the lcd inverter could be going bad, consequently needing more power than it can get off the battery.

Hope this helps,

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