About 6 months ago, the projector light failed. After replacement, I noticed a faint buzzing sound coming from the TV. It has gotten progressively worse and, to top it off, the start-up time has gone from a few seconds to more than a minute.
However, the TV now is cycling on and off about every 45 seconds, or so. Sound still works, but the set powers down, then suddenly comes alive. As if you turned the set off, then manually turned it back on.
I hate to call a technician, but it's looking like this might be my only solution. HELP, please.
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The Ballast that ignites the Lamp could cause the Lamp to fail and/or cause a buzzing noise. That being said, the Color Wheel in the Optical Block assembly could also cause a similar symptom. If Mitsubishi would be willing to help with the Lamp cost, I would call a local Mitsubishi repair facility to install it and see if the noise is still there and find out exactly what is causing it. Mitsubishi Customer Service Phone number is 1800-332-2119.
I hope this helps,
Don't feel bad about Mits. All the projection companies and all
the new TVs have markedly poorer reliability than the good old CRT
types. You should see all the class action lawsuits against even
some of the best companies!
The power supply section is not working.
Common possibilities are:
- Convergences amps have failed overloading the supply
- High-voltage section (flyback transformer) has failed
(happens sooner or later, about 8 years typical))
- CRT tube has failed overloading the supply
- Power surge has popped the power input circuit.
(Fuse, rectifier diodes, turn-on relay etc)
- One of a hundred of electrolytic capacitors has failed
short overloading the supply. They dry
out with age, are cheap to replace, but hard to find which one it is.
- Or any of many other possibilities.
In short, you need a experianced tech to troubleshoot this.