The HDMI is a digital signal connector, in the tv is handled and decoded separately from the analogue connectors. Because of that the tolerances on the signal characteristics are much tighter so , if the chip is damaged even in the slightest way, it can no longer process the signal. The video from the Xbox is displayed because the signal generated there is most likely at the limits of the tolerances.
This is a hardware fault, that no reset will fix: the AV processor is faulty and the only way to fix that is to replace the motherboard.
You lamp in the tv is probally burnt out you can replace them though.
If you've just dug your old videogame system out of the attic, you might not remember exactly how to connect it. They're not quite like modern game systems, and may require something extra to connect it to that brand new TV you have. To the left is the cable you should see attached to your videogame system. It is typically called RCA, and you will have to use some sort of adapter before you connect it to your TV. While it looks like it should fit into one of the composite jacks (and it will actually fit), that will not work because the audio and video signals are being carried in the same cable. In order to use the composite jacks on your TV, you will have to separate the audio and video signals somehow (described below).
The following instructions are relevant to most vintage videogame and computer systems that connect to a television. Specifically, the Atari 2600, 5200, and 7800. However, if you have the 4-port (four joystick ports) version of the 5200, you need a special switchbox. Try eBay or Best Electronics (catalog item) for this proprietary switchbox. If you have the 2-port version of the 5200, you can use the methods described below.
Coaxial
CompositeThe first thing you need to do is figure out what type of connection you're going to make. Look at the back of your TV and compare to the pictures to the left. It's much easier to connect to a coaxial jack, and this is what most people will do. Composite will give you better audio and video quality, but you must perform a hardware modification.
AV Switchbox Any way you slice it, generating composite output takes more work. How much more depends upon exactly what you want to do. To get true composite signals, you will need to be handy with a soldering iron and modify your Atari 2600 internally. If you've never soldered anything before, it might be a little tricky, but it's worth it for the clean signals! You may also notice that modern equipment has left and right audio jacks - this is for stereo sound, but you can't get stereo sound from your 2600 unless you make further hardware modifications. So if you make the mod, you'll just have one audio cable in use.
Now if you don't want to do that, but you're using a monitor or tv without a coaxial input (for example, a Commodore monitor), there are other options. You will still have to convert the signal to coaxial first (see Coaxial section). Then, if you have a VCR handy, you can run the coaxial connection into the VCR, and then use the composite outputs from the VCR. This will not give you the true signal clarity of composite audio/video, but it will allow you make that composite connection. If you don't have an extra VCR for this, you can probably go buy a junker at the local thrift store - the tape mechanism doesn't need to work, just the demodulator. Demodulator's rarely go bad on VCR's, they're usually thrown out because of the tape mechanism.
Speaking of demodulators, you can simply use one of these instead of taking up all that space with a VCR. Unfortunately, these are much more expensive ($100+) and you're not likely to find one in a thrift. Unless you're going to make a hardware modication, we really recommend using a straight coaxial connection, because going through a VCR/demodulator defeats the purpose of a composite connection.
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No, I don't think that's correct. I just put in a second lamp (my old one that I took out when the LAMP replacement light came on a couple years ago, even though it worked perfectly), but nothing changed.
Also, like I said, the TV works perfectly well on Component input, just not HDMI.
And your solution doesn't make sense why the video works for Xbox 360, but not for the PVR or PS3.
hey Greg. i'm having the same problem you were having and was wondering how you were able to fix it before i go buying a new motherboard. Were you able to find a solution?
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