Thank you for posting your question on Just Answer! I will be happy to help you with this problem. Can you please give us some more information so I can better answer your questions.
-Do you have a bright blue screen or would you say it is a dull blue screen?
-How old is the unit?
Please give me this information and I will be happy to assist you further.
There are a couple of things that can cause this. Please tell me a little more about your situation so I know where to go with my answer.
What kind of information are you looking for? Trying to fix this yourself or get a good idea of what's wrong and what it will cost?
If you are trying to repair this yourself, what kind of electronic repair experience do you have, do you know how to use a meter and solder?
Please let me know!
Well the first step here that I would like to take is actually to inspect the capacitors in the power supply, it is possible that you have a bubble cap or two and it is causing a no video situation, I have seen it on and LG before so it is entirely possible that it is your problem.
So if you can, remove the back and check the caps in the power supply to see if any of them have bubbled tops. Let me know what you find, if you have questions let me know.
That information is not really correct, unplugging and plugging them back in will work sometimes but very rarely. Now that you told me that you have 2 different things happening I think even more that we should check for bubbled capacitors in the power supply. It wont take us long, there is a chance we wont find anything but there is also a chance that we will nail it on the head and find the problem right away. Irregardless of what is wrong with the set, it is going to be internal there is no reset or reboot for this set other than the unplug and plug back in which you have already done. We either have a bad power supply, bad main, or bad panel. For your friends sake i sure hope we find a bad power supply, because the other two most likely will be more than the set is worth.
Let me know if you can check those capacitors for me.
I actually am getting ready to sign off, but I will be back for most of the day tomorrow if you will be available? I should be here from around 1pm EST until 11pm EST tomorrow.
Will this work for you?
Ok well post what you find when you check them and I will respond when I get back, just check back when you can after that.
To get back to me you will need to get back to this same page, there should be an email that this company sent you with a link in it to get back to this same exact page, once you get back here you will be able to post and I will be notified and we can continue.
As far as a PDF, I have never heard of getting a copy of the conversation in one before, But I will send a note to the moderators asking them about that right now and get back to you with what they say.
Let me know if you have any more questions, or what you find with those caps.
Sounds good, see you then Frank!
Ok next we would need to check all the voltages coming out of the power supply, just check the wires at the plugs coming out and see what we get.
Can you post a picture of the power supply?
(if you can post a picture, please click the icon above where you are typing with the green tree on it. This will allow you to upload a picture)