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Ampro 4300 Problem can't turn on

post #1 of 6
Thread Starter 
To Curt Palme and Ampro expert
My ampro4300 is giving me a problem when I was watching today all in a sudden projector show a small picture size in center of screen both horizon and vertical, then I turn it off but it can't be turn off so I shut off the rocker switch, when I turn it back on again it auto-restart then after reading rom version then it halt and giving the code error of 08@43 then 42 then 47 it keep rotating, I turn rocker switch off again now when lcd display come to the rom version by ampro corporation then the power turn itself off. Any one can please advise me which board is giving this problem and how to test it. I having a blue out of convergence and registration jitter off vertically for few days when it first turn on then disappear before this happen.
post #2 of 6
The code readout indicates a communication error between the CPU and the registration or other board. But that doesn't mean your registration or other board has failed. I would first check the battery voltage on the CPU board. It should be at least 3 volts if I remember correctly. if that checks ok then you can turn off the I2C testing and see if the projector will run and see what kind of symptoms you have. to turn it off, locate switch 5 on the CPU board and switch it to off. try starting the projector again.
post #3 of 6
When the picture went small, did it go out of focus also?
post #4 of 6
Thread Starter 
Hi
Now the problem has changed, when pj auto-restarting the remote lcd read ROM version by ampro corporation and i hear regular relay snap and pj should show projector's picture as usual, but instead in turn itself off again.

Thanks
sam
post #5 of 6
Do the LEDs on the power supply turn on before the projector shuts off?

Scott
post #6 of 6
Thread Starter 
Hi Scott
Yes all the voltage Lcd turn on before it shut down.

Thanks
sam
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