My Panasonic SA HT-680 went dark and the "AC In" light in the upper left hand corner of the front panel keeps blinking. Other than the clicking sound it makes, no controls either on the front panel or the remote will work. I tried unplugging it and plugging it back in but there is no change. Please advise.

Press and hold the "power" button located in the upper right hand corner of the phone, on the top of the device.

It sounds that the main digital board has damaged. Visit the site named 'Electro-help' for more details. Click this link. View it in "Timeslide" option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 1000 posts to different brand TVs now. Pull up older posts there.

I have the same problem. Factory reset did not help (hold Vol-minus on set and menu on remote five seconds, then unplug). Can there be something in service mode that would help?

update the latest firmware and the problem will be solved

the best way and easy way to do it is go to walmart and get a wiring harness that works wit 92 chevy. makes life simple and looks professional. cost about 8 bucks. but here is the wiring diagram

Constant 12V+ Orange Switched 12V+ Yellow Ground Black Illumination Gray Dimmer Brown Antenna Right Front Front Speakers 4" x 6" Dash Left Front (+) Tan Left Front (-) Gray Right Front (+) Light Green Right Front (-) Dark Green Rear Speakers 4" x 10" Rear Corners Left Rear (+) Brown Left Rear (-) Yellow Right Rear (+) Dark Blue Right Rear (-) Light Blue

$35

http://remotes.com/remotes/servlet/rs?v=1&o=c&o=c&a=Search&uid=0&m=sa+ht-680&uuid=A12953846880641

I had this exact same issue just yesterday. Channel info would flash intermittently. While set was in this mode, could not enter menu, change channels, etc. from remote or front panel controls. Similar to tjh492, I thought it might be an overheating issue. But unplugging the Viera and waiting for set to cool made no difference.

I then remembered that this issue popped up the instance I surfed to a particular channel (FWIW, 26-3 "Me Too" on Comcast here in Aurora, Illinois, USA). I had a hunch that there might be an issue with the signal on the channel that prevented the Viera from properly syncing, so I decided to unplug the antenna cable. Once I did that, the channel info displayed steady. I was then able to change channels (of course screen was blank as antenna cable was unplugged) and enter the Viera menu. I immediately went to channel set-up and manually removed channel 26-3 from the channel list. After reconnecting cable, Viera was back to normal. Since I'm not a big fan of "Me Too", problem solved :)

Not sure why a digital channel sync issue would effectively make the Viera remote and front panel controls inoperable. Pure speculation, but it could be that the Viera microprocessor was overloaded trying to sync to channel and this prevented any interrupts from remote or front panel controls.

Try wiggling light switch side to side kinda hard, (the light switch is the one on the left) it should come on, showing you its a bad lt. switch.if that fails install 1 new 40watt,(long) appliance bulb. but it is going to be the switch or the bulb considering there wasn't any wiring work done on unit. part# for the light switch is 3060140 make sure the back of the switch is white not black (black is a fan switch) Good Luck !!!