Re: Hitachi Plasma has no video, solid blue light

The problem seemed to be my meter and the use of it. I was using a craftsman model 82140. When I grounded the common lead of the meter to the TV frame, the voltages at the power supply test pins where nearly twice what they should be. However when I put the common lead of the meter on one of the power supply's ground pins at a connector, then the voltages were normal. I also checked the voltages using an older meter, Ideal model 61-720 and the voltages were correct no matter where I grounded the common lead.

The TV is...

Re: Hitachi Plasma has no video, solid blue light

The horizontal lines were corrected by reseating the ribbon cables on the upper buffer board. The discolored vertical lines were corrected by reseating the ribbon cables on the new logic board for the lower ABUS-B and ABUS-C boards. I now have a good picture however the power supply voltages are still way too high. All of the power supply connectors show the correct voltages when the TV is in standby mode however they go high when the TV is on. I did notice the grounding pins on all of the power supply connectors show a voltage across...

Re: Hitachi Plasma has no video, solid blue light

I replaced the logic board and now get the correct Vsago turn on voltage and also finally get a picture on the screen. However I am getting some black horizontal lines from a few IC's on the upper buffer board and some off color vertical bars in two spots. The Vs, Va, and Vcc voltages on the power supply are now constant but are way too high. I'm not able to adjust the voltages down anywhere close to the correct reading. I'm thinking the high voltages are causing the lines and bars but I'm not sure why the voltages are off so much....

Re: Hitachi Plasma has no video, solid blue light

Thanks for the guide and information. Using it, I've confirmed that all voltage readings are correct on the CN63, CN64, CN68, and CNPPS connectors except for the Va and Vs Power Supply voltages on CN64. I checked the turn on commands from CN68 pins 7 & 8 and the Vcego at pin 7 is correct and working but I'm getting no output from the logic board Vsago at pin 8. I've tried unplugging the CN68 connector to reset the logic board several times but it has no affect. I've even tried many combinations of unplugging certain boards and...

I am repairing a Hitachi Plasma P50S601 and could use some help.
A relative was watching the TV and the bottom 1/3 of the screen turned yellow and then the whole screen went black with the Blue LED flashing. She had to unplug the set to restart the TV and it worked fine again before going black after a short period of time. This repeated itself a few times until now when turning it on, the screen is just black and the blue power LED stays constant and on. She doesn't know how many times the LED flashed providing a fault code.
I did my forum homework and read about the normal bulging...

Re: Hitachi P50H4011 Plasma no picture

Rex, did you ever figure your problem out? I have a different model Hitachi (P50S601) but a similar issue. Only a low 3.8V Va and Vs voltages from the PSU and both of my SDR buffer boards test good. Blue light stays lit (no flashing). Tried a different PSU but no change. Thinking about trying a new Y-SUS next but wanted to see if you had any luck. I have sound but no picture but my Va and Vs don't return if I remove both buffer boards.

Re: New Members - please post your introductions here

Hi, I'm new to the group. I've found a lot of good information and decided to join to gain even more benefit from the knowledge here.