We cannot see the menu. We unplugged the TV and re-plugged it. We checked the outlets. No difference.
We have cable but we do not have a box. Our other TVs are working.
O.k then it means that part of the main board is working and there is standby voltage.At this point it looks like your power supply circuit may be defective.I will get some info on that circuit in a few minutes but i`d like to know first;
As this will require taking the back cover off, do you wish to look into this yourself ?Or would you just like to have an estimate of the repair cost in a shop ?
Thats great if you can take the back cover off as it may give me a better idea of the problem.
I will upload a picture of the circuit i suspect the most and what to look for.There is one question i forgot to ask though;Did you have any difficulty lately to turn the tv ON ?Any acting up ?
We have all of the screws off, but the back still seems to be attached. It is loose at the sides. We don't want to put too much pressure to take it off. What should we do?
It is hard for me to say without being there or having a visual but look closely where the input connectors are , there might be screws left there and also you may have to take the stand off.To do that you will have to lay the tv flat on its face and then you can re-install the stand temporarily to work on it.
okay, we're doing it.
We've got the back off. What now?
Great, as it seem there are 2 different version of your model,i will upload 2 pictures and i`d like you to tell me which one is in your tv ?Power supply 1
Power supply 2
Sorry it took a while to get back to you ,ended up locked on a previous post.I have here another picture of your board and this time i circled and pointed to some capacitors.I`d like you to look closely at them and tell me if some of them appear to have a slightly bulging/rounded top compare to others.
Their tops should be perfectly flat.
Was afraid of that !!Then it means (most likely) that your power supply circuit is o.k .Since this morning i found some other info about your model and the problem you described and it looks likely that the main board (A board)may be causing this problem.
I will show you this board and what it cost , be right back
O.k i`ll start with your board part # XXXXX , this number can be used to search for suppliers.And this is a picture of it (although you can see it now !) the price at this supplier and also where you can get it , click the link below;
There is a very good chance that you can just install that board and everything will be fine but since sony never do anything like the others, there may be some adjustments to make in the service menu, These adjustments are too complex to explain in the present context and you would need the help of a repairman familiar with sony products.In any case you will save good money by buying it yourself, here is an example of what a repair shop may charge for the main board;http://www.tvserviceparts.com/1-857-092-21.html
Be waiting for your questions.