20 Most Recent Sony KDL40EX500 40 in. HD-Ready TV Questions & Answers

I had the same issue with my sony kdl40ex500. All I did was update the firmware and it fixed it. You can get the update at the SONY website for free.

Why are you using 4:3 letterbox? It might be the default aspect ratio but widescreen tvs should be set to 16:9 aspect ratio.

This is a issue with the power supply board here is a link that shows you what this blinking light codes mean
Seven blinks - High voltage shutdown. The high voltage has exceeded 33k and the unit goes immediately into safety shutdown. Check power supply regulation and horizontal circuits.

http://www.techlore.com/article/15444/Understanding-Sony-Television-Blinking-Codes/

Hello, The error that you are receiving is a "Panel Temp Error". If you are attempting to fix it yourself then check that the fans in the tv are not clogged and can spin freely. Good Luck. Rich Lilja

If You do not see any open link or resistor, short IC or transistor on power supply it must be a control board problem. You must get the set to SONY, as it is necessary to exchange board and upgrade software.

Tv have no reset button.Only way to do a tv resetting,to do the tv is it to unplug,replug it back like about an hour later.The tv now should have power and be working again.If tv still have the same problems,mean the tv power supply board it is shorted and dead,that the board where the tv a/c power cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new tv refurbish power supply board for the replacement.

Please follow up with me if you get any type of sound.

I had a similar problem. I had a 52" RCArear projection tv. It would do this when I initially turned on the television, but then after a few "on/off, on/off, on/off" cycles it would stay on. Eventually it started doing it more; until finally there was a spark and that was it. The tv was dead.The bloggers called it "the blinking green light of death" (because of green light on the panel).The power board is going out.ALSO holding down the Input and Menu buttons afterward will give you some diagnostic information via 2 sets of blinking indicator lights.

You may very well have issues with capacitors on this set being that it is or very similar to the V26 chassis. Since I have spare test lamps laying around, I would normally try that first. If the lamp still would not stay lit, I would then suspect the electrical chassis (capacitors). When I suspect the chassis, I can usually verify it by pulling it out and partially disassemble it and find blown capacitors

hi,

first of all check ur cable connection. find out is there is any trouble.
ok

I would try a new T-CON board first.

The problem in most of the case are: 1. Interference from a defective fluorescent lamp at your room sending signals to the infrared receiver of the TV. 2. Defective infrared receiver itself that sending noisy control signals to the CPU. 3. Defective manual control withes it has leakage. 4. Water damaged control switch PC board.

Do a reset to this TV, and then check. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.