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Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/
Main system control memory IC fault.
Main board fault. Shorted component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/
Possible failure of the main control panel, possible the processor is malfunctioning or faulty.
remove and fix back all connections and connectors.
if there is no action or response then the processor/associated circuit/mother board can be defective
The Power supply is either faulty Itself, or it is detecting a fault, within the unit, and shutting the unit down for safety reasons. Are you sure there is no timer, sleep timer etc, active? You cannot repair something like this at home. You need to get it looked at by a service center, and ask for a "Quote" for the repair.
Strange. Are you sure it's the TiVo at fault? I'm thinking when you turn off the unit and back on again you're actually forcing your TV/Monitor into the correct input. When it next goes into black and white, try selecting different TV AV inputs, normally a square or circle with an arrow in it on the remote control. If this fixes it, I'd suggest that you have another piece of equipment connected to your TV that's fighting for control.
I'm not a tech person, so take this for what its worth. I had the same problem with my Vizio and my Time Warner Cable HD/DVR box using the HDMI cord connection. HD channels were always fine, and non HD channels were fine until I went to an HD channel and back. When switching back, the non-HD channels would be shifted to the left as you describe. After much back and forth with both Vizio and Time Warner (each saying its caused by the other), I stumbled across the following fix...
I went into the cable box (scientific atlanta 8300) "settings", under "display," under "output resolution." There was a list including 480i, 480p, 720p, 1080i, and "auto select." I unchecked both 480 options and left 720 and 1080 checked. Problem solved. The other "Display" menu settings are as follows: Picture Size = Stretch, Aspect Ratio = 16x9.
If you had the Speakers Set to A (not B) and no headphones connected when you pressed the TEST TONE button on the Onkyo HT-R540 (also known as the HTS-790) remote, and you had no sound from the Center Speaker then try the following steps.
1) Check the Center Speaker wiring at both ends under a bright light and make sure that there is not a strand of wire touching the Receiver Chassis or another speaker post. Check both + and - .
If that looks okay,
2) unscrew the Center Speaker Post connections on the Receiver and verify that the bare stripped wire is making contact. Often, the insulation is too far into the connector. When screwed down, the wire's insulation is crushed and keeps the bare wire from making contact.
If this looks okay and the unit is under Warranty, your last test is to:
3) temporarily swap the wires from the Center Speaker with the Right Front Speaker. Turn the volume down low and try the TEST TONE button again.
If you now hear sound from the Center Speaker box itself and none from the Right Speaker box, then the Receiver is the problem.
If you still do not hear sound from the Center Speaker box, then the Center speaker itself is defective.
Sounds as though your back light for the LCD may have gone. It is not a job the DIY repairer can easily complete therefor you should return it to Archos or a certified repair center for an estimate. If it is in warranty Archos MAY cover it, though if they deem it has been dropped will likely charge you.