My shure PGX4 only has the audio light flickering , I can not get the channel light to come on

There are many reasons this could be happening. Call Shure Tech Support at 847-600-8440. They can help you troubleshoot. Have the mic nearby when you call them.

You can tune the ULX system to any frequency you want. But the PGX system is limited to certain groups and channels. It is possible but quite inflexible. You will also run into problems with the different compander and pilot tones within the differing units. With your PGX system you should have got a chart of frequencies which correlate to the frequencies. Match this up with a frequency on the ULX handheld and this should work ok. The "sync" feature will not work you will have to do this manually.

That is not possible. The PGX4 can only pick up one mic.

See the following:

http://shure.custhelp.com/app/answers/detail/a_id/363

Have you synchronized the microphones to the base yet?

If you do not have manuals. you can download them here:
http://www.shure.com/americas/support/user-guides/all-user-guides/index.htm?PageNumber=15
and http://www.shure.com/americas/support/user-guides/all-user-guides/index.htm?PageNumber=14

You essentially want all the "PGX" manuals in the language of your choice as they did not distinguish the spec sheets from the manuals in the list.

The T1 can not be programmed. It is a single frequency receiver and will only operate on that frequency. The T3 receiver would need to match the frequency of the T1. The PGX4 will never work with a T1, as they operate in different frequency areas.

Unfortunately, it is nearly impossible to troubleshoot this over email. I suggest calling Shure at 800-516-2525. They can help you trouble shoot the problem. Make certain you have the wireless system with you when you call them.

Look for a possible source of interference.

The unit is likely FM and an FM receiver will "capture" the strongest signal right one or not.

Key is to find which of the two components is faulty. The green LED's really mean very little... other than battery and carrier received.

If you can find another system to isolate which is failed, then progress can be made.

Call Shure Applications at 800-516-2525, prompt 3. They can help you troubleshoot.

It is definitely a Sync issue.

1) Make certain the microphone is ON and the light on it is green.
2) Remove the battery cover from the microphone.
3) point the **** end of the microphone (where it says Sync) toward the Sync button the receiver (about 6-8 inches away).
4) Press the Sync button on the receiver. You should notice the light on the microphone flash.

If this still does not work, call Shure Applications at 847-600-8440.