I have samsung tv model number le40r88bd. The problem I'm having is that when I swtich on the tv it makes a clicking noise as normal, but the blue light under the samsung logo flashes about 3 times and then goes off, but I don't receive any picture on the screen at all. When the tv was working fine the blue light used to stay on all the time whilst the tv was on.Please can you help me with this problem whcih will be much appreciated.Thank you.
How long have you had the set for and when did the problem first occur?
Additionally, when you say you don't receive any picture, do you still get sound?
I don't know how old is the tv, but I bought the tv from a friend of mine about a year ago.
When I say I don't get any picture, I mean that I don't get any picture at all, even if I press the source button on the remote nothing appears on the screen and also I don't get any sound. The blue light at the bottom of the logo flashes about 3 times and then that goes off, but the power led stays on all the time.
Please disconnect the set from AC power, then press and hold the power button on the TV itself (not the remote), for 10 seconds. After another minute, plug the set back in and press power once. Do you still have the same problem?
I hope you got my reply, if not the reply was as follows:
I tried what you advised, but the problem is still there. The blue light under the samsung logo flashes 5 times then it goes off, but the power led light stays on all the time.
It's getting late now here in the UK. What ever you advise me next I'll try it in the morning.
Unfortunately I do not have good news.
The Mainboard, or the Power Supply on your set has failed. Voltages must be checked at the Power Supply Outputs, including the one to the Mainboard to determine which board has the fault. The power supply is the board that the AC cord connects to inside the TV. Often times, one or more capacitors on this board fail, and will give you these symptoms. The mainboard is the board directly mounted to the rear panel of the set, that routes and processes all of the AV signals to the TV. This is a common mode of failure for these sets. Average cost or this type of repair is around $250-$275 parts and labor. There is no reset or series of buttons you can press to fix this problem, and the set will require service.
Over 20 years of experience installing, troubleshooting and customizing electronics.