F7 LCD TV will not turn on
This TV will not power on. No lights at all. After plugging into the wall with the back cover off I can hear the power supply board spinning up and shutting down over and over again. Assuming the Power Supply was shot, I replaced it only to find the new one was doing the same thing. I then figured the main board must be the issue so I replaced that only to see the problem continue. During that replacement I discovered by sheer luck that if I unplug the data ribbon which connects to the main board from the IR sensor while the TV is plugged in, the power board will power up and I no longer hear the spinning up and shutting down cycle. I then plug the data cable back into the main board. I then push the power button and the TV turns on. However the remote doesn't work. I then power the TV off and the power board goes back into the spin up cycle again and the tv will not turn on. After this, I thought for sure the IR sensor on the TV must be bad, so I replaced that....and guess what? the problem continues. I am running out of things to replace. what exactly is the issue here?
Televison & Video - Philips - 46PFL3908/F7 46-Inch 1080p 60Hz LED HDTV
Answers & Comments
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. 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; visit the site linked here.