Re: Sharp LC-C5255U No Blink Codes only Black Screen

Wasn't able to take images. camera was dead. phone camera images were not good enough to see the detail required. have a new battery charged and ready. Also after reading the previous posts from jkmorek about a similar issue I am going to work through those steps and add the results here along with the board images.

Re: Sharp LC-C5255U No Blink Codes only Black Screen

Here are excerpts from the Sharp Service manual concerning the LED/OPC codes. Also I'll take full pics later tonight of the main board and post tomorrow.

According to the manual (assuming I am reading it right) my codes are:

Power LED flashes 3 times. Communication failure with main CPU. See Codes and Codes3

OPC LED flashes 2 times. DET_D3V3 failure. D3.3V not applied at CPU (pin 36) See Codes 2....

Re: Sharp LC-C5255U No Blink Codes only Black Screen

No backlights that I can tell. I did however revisit the trouble codes on the tv. Evidently I never left it powered up long enough to get codes. I now get both the power and OPC leds flashing twice together and then the power LED flashes one additional time and then the cycle repeats.

I am able to turn this unit on and it stays on. However, I am not getting any Blink Codes (power LED nor OPC) The power LED stays green but I have no picture. Any troubleshooting info would be greatly appreciated. Thanks. Also I have removed the main power board and did a visual inspection. Did not find anything. Also did the channel up vol down trick with same result. No difference doing that or just hitting the power button.

Greetings from bigdotbob (John)

Hi From bigdotbob (John) I'm new to this forum. I am originally from Cullman Alabama but currently live near Trinity Alabama. I currently work as an engineering tech at Redstone Arsenal in Huntsville Alabama. I am a HAM radio (General Class) operator and have a pretty decent background in electronics. Normally I try to repair my own devices when they fail but sometimes, you have to ask for help. I have experience with Laptop repair, PC repair, iPod and media player repair, and some game system repair. I have worked on Longbow Hellfire 2 missiles and...

Re: sharp lc-c5255u only blink codes no picture

Also when the PSU comes on you get a relay click. When I turn the unit off I get a louder relay click.

Re: sharp lc-c5255u only blink codes no picture

I am new here and have the same TV as mentioned. Mine gives no error codes and only has a solid green led when the power button is pressed. Just a black screen. Tried the force power on with same result. Any ideas.