Hey guys, thanks in advance for your help!! I have gotten some great info and help from U guys!!
Ok, so, this tv has the 9 blinks error. " No communication between Sys MPU and Panel MPU"
Both these chips are located on the "a" board. Sys MPU is IC1100/ Panel MPU is IC9003. I am no electronics tech but I am super cheap and I deal with low voltage controls every day. I did some basic checking and I found that the STD_3.3VDC is comming from the "K" board (I think). The 3.3vdc is just fine comming in on the connector. When I check the 3.3vdc on the Panel MPU it comes on with startup but then goes off after error. That voltage comes on and goes to 2.49VDC before it shuts down. There is enough time for it to settle out before it shuts off.
I know from my own experience that devices shouldn't tolerate 10% higher or lower than design voltage. So, I was hoping to make a jumper to power up that chip in stead of finding the bad component in the switched circuit. I know this is not sound troubleshooting or repair. Was thinking of cutting the trace that supplies that area vith the 3.3vdc, make the jumper and see what happens....
Am I nuts? Worth a shot?
Better Ideas?
Its a very nice tv...They want $155 for a used "A" board on ebay....
Ok, so, this tv has the 9 blinks error. " No communication between Sys MPU and Panel MPU"
Both these chips are located on the "a" board. Sys MPU is IC1100/ Panel MPU is IC9003. I am no electronics tech but I am super cheap and I deal with low voltage controls every day. I did some basic checking and I found that the STD_3.3VDC is comming from the "K" board (I think). The 3.3vdc is just fine comming in on the connector. When I check the 3.3vdc on the Panel MPU it comes on with startup but then goes off after error. That voltage comes on and goes to 2.49VDC before it shuts down. There is enough time for it to settle out before it shuts off.
I know from my own experience that devices shouldn't tolerate 10% higher or lower than design voltage. So, I was hoping to make a jumper to power up that chip in stead of finding the bad component in the switched circuit. I know this is not sound troubleshooting or repair. Was thinking of cutting the trace that supplies that area vith the 3.3vdc, make the jumper and see what happens....
Am I nuts? Worth a shot?
Better Ideas?
Its a very nice tv...They want $155 for a used "A" board on ebay....
I did manage to get a board to 9 once swapping that 48 pin flash ic and accidentally creating a short on one of the paths to that chip.
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