Digital Tuner (QAM) Problem (warm up)?

[kestep]

After reading the excellent posts in this forum, and seeing this TV for myself, I decided to purchase the Sanyo HT30744. I know there have been a number of issues, but assuming one gets a unit without any of the major problems, it is a heck of a deal.

I purchased a unit last night and the picture looks great. I have seen some of the minor issues, but nothing that is a show stopper....well, maybe...

I do have a problem that I haven't found any reference to in this thread or the original thread (although there is so much to search through). I get about a dozen clear QAM cable channels including DiscoveryHD and have been blown away!

The problem occurs when the unit is 'cold' (not been on for a while). When it is first turned on, it will indicate no signal on any digital cable channel (analog is fine), or it will display a garbled display. After a few seconds, the picture will start to appear along with many blocks of color that are not moving. Slowly, the picture will continue to improve and sound will start and stop, until it finally is working perfectly.

After it has been running for a bit, turning it off and back on results in a normally operating set with a great picture and no initial garbled display. If it is again turned off for an extended time (1-2 hours), the same problem reappears.

Is anyone else experiencing this "warm up" problem? I didn't think modern electronics needed to "warm up", so this has me a bit baffled.

I hate to return it, because other than this problem, it looks GREAT!

Any advice or fellow sufferers?

Kevin

[snclawson]

This is bizzare.

My Sony KD-34XBR960 does exactly the same thing. If the thing's been off for a while, it takes a couple minutes for it to get a picture; until then it just says `No Signal.' I actually had Sony come out to try and fix this, as the first set that I had (with convergence problems) never did this. The `fix' was to replace a tiny surface mount resistor on a board. It worked for a while, but I'm having problems again.

Does this also happen for ATSC channels, or just QAM? (The Sony tuner has the same problem on both).

[kestep]

Originally posted by snclawson
This is bizzare.

My Sony KD-34XBR960 does exactly the same thing. If the thing's been off for a while, it takes a couple minutes for it to get a picture; until then it just says `No Signal.' I actually had Sony come out to try and fix this, as the first set that I had (with convergence problems) never did this. The `fix' was to replace a tiny surface mount resistor on a board. It worked for a while, but I'm having problems again.

Does this also happen for ATSC channels, or just QAM? (The Sony tuner has the same problem on both).

This happens with QAM, but I can't really say what it does with ATSC since I don't use an OTA antenna. I'll have to try it and see, but my guess is that this is a problem with the 'digital' tuner in general. In a related thread, another user of the same model I have has this problem, so it isn't a single set problem.

Kevin

[UMDMatt]

I have a 34XS955 and I don't experience any delay in the OTA tuner. I would notice too because the only source I have for tv viewing is my antenna. After the 10-15 seconds it takes the set to turn on, the channels lock in immediately.

[TomClancy]

I got the same problem with my Sanyo HT30744. My TV needs a good 20sec just to get a signal.