Tuner Trouble No tuner input signal from the cable. Snowy - but traces of sound and pix. All other inputs work. Suspect Power surge during storm. Tuner likely not getting a proper voltage from the power supply. Anyone have experience with this? Set isn't old and a diagram is not listed anywhere at this time. Recommended sources are automated and I'm at a dead end. I can do this if I can locate a schematic. I need the diagram unless someone has already located a short zener and can point me toward it. There are dozens of sources for schematics - but no one has it available. Please don't suggest a source unless you know they have the diagram - I'm tired of beating the bushes - I give up. Thanks TVGUY

It appears that during the storm there may have been an electrical surge that damaged the electronics of your tv. If the tuner is working fine then the affected area (board) is the one that has the HDMI input sources.

I can suggest unplugging the TV and leaving it off over night. This will do a power reset and may correct the problem. If not the only way to determine the problem with the TV is testing the circuits. For a simple repair you can expect to pay in the ballpark of $100 for the repair.

Hope that helps.....

tuner may be bad, it is possible if rear inputs work to route signal to one of those inputs by using a box with the same type of connections the rear inputs have--bypass the tuner in the set with a box.

You must apply a clean signal and see that the picture is clean if not the TV tuner section is faulty.
If there is snowy picture then the input RF section , the TUNER section and the VIF/SIF section must be checked.
There is not much in the menu than to use a fine tuning to have a clean picture.Otherwise the tuner is a suspect.

yes, you may be lucky to just to burnt one of the source/input mode try switching them.
for example use a video cable instead a coax if you still dont get a signal that means the picture uotput board is damage by the storm.

It sounds to me like you have a tuner issue, I have seen this before. If you have a good picture from other sources and they have the same antenna input, the tuner is suspect.

I hope that this helps you solve your issue.
Thanks
asnowman

I would be inclined to say that there are only two likely problems that you may be encountering. Either you are getting a bad signal feed, or the connectors on the cable are getting old and need replaced. The connection to the cable can break down over time, especially if they have been connected and reconnected several times. I cannot rule out problems caused by the transition to DTV, but that doesnt seem likely if there are only a few channels affected. As far as "selective failure" of the VCR's built-in tuner, I would say that that is also a very unlikely source for the problem If the tuning components inside the tuner had gone out, I would expect to see a problem on all channels watched through the system. If you are having this problem on all channels of the sony, then the tuner could surely be the problem, but if you haven't used it much that would indicate a problem at manufacturing, however since at least one of the machines is working fine on some channels and not on all of them, I would suspect the connections or the signal from your cable company. Contact them first ands see if they are having signal issues, if not try replacing your connectors.

Try first unplugging power cable for 10 minutes.

From experience, I suspect that the dish has lost it's optimum "focus" on the satellites, and your signal has dropped. In your case, tuner #2 just happens to need a little more signal than tuner #1 - and that's revealing the root problem.

If you can have a second person handy, use the signal meter function and view the signal. Then one person should move the dish a bit (likely upward a hair). If the signal goes up with just the slight movement of the still tight dish, that's the problem.

If so, it's time to align the dish.

Hi,

A snowy video indicates that your input signal is relatively weak. On the other hand, a noisy picture is when there are too much interference is super imposing on the video.

Snowy picture comes about when the signal coming in the RF INput (Ant/Cable) at the back of the unit is below a certain level. If this is the case, then it is not a problem with your TV but rather your aerial (antenna) or the cable from your provider. A way to verify that it is the ant/cable that is the cause and not a defective TV/tuner is to hook up an old VCR set to Ch. 3 or 4 to the RF IN of your TV using a short 75 ohms coaxial cable terminated at both ends with FP-5 connector. Play a known clear good tape and set your TV to Ch. 3 or 4 as the case maybe. If the picture is relatively clearer, better, then you have just confirmed that it is indeed your aerial or your cable (provider) that needs looking into. If on the other hand, the VCR signal is also snowy then chances are that you have a problem with the input stage of your TV including possibly your tuner.

For your aerial problem, antenna orientation or replacing with a higher gain antenna might help solve the snowy signal. For your cable problem, you have to call-in for service from your cable provider. If it is a TV problem, your best course would be to seek the services of a qualified TV technician since this involve electronic circuitry analysis, diagnosis and possible component replacements.

Additionally, you may try looking for any loose connection, loose grounding, broken wire or anything out of the ordinary in your connections.

Hope that this be of some help/idea. Pls post back how things turned out or should you need additional information.

Good luck and kind regards.