Radio stopped working. Screen would go back and forth from dark to light blank. Unable to turn on or off. Had to remove battery from radio to stop the alternating sequence. Reinstalling battery and turning on the radio resulted in the radio going to station for about 3-4 second, then blank.

The lights on the radio are dimmed with the instrument panel dimmer control so usually they are fed with a separate 12 volt signal that is separate from the main radio power. It may have a separate fuse but may not. If it's not a fuse it could be a loose connector going to the radio, assuming the rest of the instrument panel lights are working correctly. I suppose it is also possible that the dimmer control has two sections, one for the radio and one for the panel lights, and the section for the radio is bad. Run the dimmer control back and forth stop to stop a few times, push on it etc. to see if that effects it. I suspect it is somewhere in the dimmer circuit.

I take it you mean that the radio stops working completely once the headlights are switched on. So if you sit in the car during daylight hours and turn the lights off and on, the radio does the same except the other way round (lights off, radio on). Have I got that right?
It cannot be the fuse because the radio wouldn't work at all if it had blown. The wiring may well be the problem. Something is either shorting or I am thinking that there is not enough power (for whatever reason) to run both lights and radio at the same time, although the battery draw on a radio is relatively low. Is your battery charging correctly? Does it happen if you open all doors and the interior lights operate. Try opening all the doors and turning headlights off and on. Do the interior lights turn off and on like the radio does?

Try putting your radio code back into the system it should be written in the hand book if you don't remember it.

There are two alarms, and the steps are the same. Make sure both are off.
For Wake 1 alarm.
1.Look on the face. One the left are two symbols, a 'bell' and a 'music note'. 2. Press the 'Wake 1' button on top, several times. Notice how the green circle on the left of the face switches back and forth between bell to music note. 3. HOLD DOWN WAKE 1 BUTTON, until both lights are off. The Wake 1 alarm is now off.
Wake 2 alarm: Look at green circles on the right side of the face. HOLD DOWN WAKE 2 BUTTON until both circles are unlit. The Wake 2 alarm is now off.
Get a piece of paper, write "HOLD DOWN WAKE BUTTON to stop repeating alarm" and tape it to the back of the clock.

Check your fuses. The dash lights are on a different fuse. Also check dimmer switch. If its not one, then it is the other. Try working dimmer switch quickly back and forth( with the lights on when it's dark so you can see if they come on).

It sounds like it is some sort of Demo mode for the radio. My Sony has this, and I have to press and hold the volume knob until I get to the alternate menu(not Bass, Treble, Fade, etc.) After about 3 seconds I can scroll with the know to the option I want. I look for Demo and then simply switch it off.

hi.
find your radio here...http://www.ibiblio.org/tkan/audi/radios/radios.html

then follow link for program instructions
good luck

I had the same problem with my Pioneer Inno Gex-Inno2BK XM radio receiver. One evening while leaving work, I gently took it out of the cradle & the screen suddenly went completely blank & all white. I could still hear music but there was no screen visible. Solution is this: (1) Gently remove the back cover which covers the battery. (2) Gently remove the dark blue square battery which is only about 1 inch (width) by 3/4 inch (height) by 1/4 of an inch in thickness. I removed mine by holding the receiver upside down & gently shaking it with one hand until the battery came out into my other hand. After about 4 or 5 gentle shakes, it came out. (3) Wait about 10 seconds. (4) Place battery back into XM radio receiver being careful to line the copper power receptable on the battery with a corresponding surface inside the receiver. Each copper area is only about 1/10 of an inch by 1/10 of an inch. Use this as a guide when putting the battery back in to make sure it's lined up properly. (5) Gently slide the cover back in place & let it snap into place. (6) Turn receiver back on by pushing power button like normal. (7) XM receiver should boot up with a full display just like new. All recorded songs are still in place. Nothing has been lost. Problem solved. Root cause of problem is probably some type of boot-up issue with the receiver in which the battery (i.e., the power supply) just happened to be slightly ajar...which also persisted even when placing the receiver back in the cradle until the above steps were taken. The steps above worked beautifully for me...Hope it works for you as well! Have A Great Day...Tom Armstrong

I had the same problem with my Pioneer Inno Gex-Inno2BK XM radio receiver. One evening while leaving work, I gently took it out of the cradle & the screen suddenly went completely blank & all white. I could still hear music but there was no screen visible. Solution is this: (1) Gently remove the back cover which covers the battery. (2) Gently remove the dark blue square battery which is only about 1 inch (width) by 3/4 inch (height) by 1/4 of an inch in thickness. I removed mine by holding the receiver upside down & gently shaking the battery with one hand until the battery came out into my other hand. After about 4 or 5 gently shakes, it came out. (3) Wait about 15 seconds. (4) Place battery back into XM radio receiver being careful to line the copper power receptable on the battery with a corresponding surface inside the receiver. Each copper area is only about 1/10 of an inch by 1/10 of an inch. Use this as a guide when putting the battery back in to make sure it's lined up properly. (5) Gently slide the cover back in place & let it snap into place. (6) Turn receiver back on by pushing power button like normal. (7) XM receiver should boot up with a full display just like new. All recorded songs are still in place. Nothing has been lost. Problem solved. Root cause of problem is probably some type of boot-up issue with the receiver in which the battery (i.e., the power supply) just happened to be slightly ajar...which also persisted even when placing the receiver back in the cradle until the above steps were taken. The steps above worked beautifully for me...Hope it works for you as well! Have A Great Day...Tom Armstrong

ok you will see to screws at the back unscrew them and take it out then smash it becase it is gay