X-Box 360 all solid red LED's 15 seconds after startup.

it is a solid red LED and im using WPA & WPA2 security and UPnP is enabled

The Xbox 360 slim, as in the title.

Just the centre turning red, i get the beep, green, the the arc and it goes solid red for a couple of seconds then off.

Moved console to a new location. On start up console power lite turns red after 3 seconds. Power adapter lite stays green. Any ideas?

Is it blinking red ? Or solid?

This is from TB support page:

In order to play game audio, a wireless headset must be "paired" to its transmitter. The headset and transmitter are paired out of the box. The instructions below are only necessary if pairing appears to have been lost. This can happen if the headset is
turned off for a long time or is out of range.

When the headset and transmitter are paired, the transmitter's Power/Pairing LED will be solid. If this LED is "blinking" slowly (slowly fading in and out), it means the transmitter is not paired with the headset and game audio will not play through the
headset.

The Transmitter sends game audio only. Chat is sent to the headset directly from the controller

Pairing Instructions

1) Turn off the headset by pressing the headset Power button for 3 seconds. The LED on the headset should be completely off when it is powered down.

2) Unplug the transmitter's USB power cable to power it down. Wait 3 seconds and then plug the power cable back in. The transmitter's Power/Pairing LED should now be pulsing slowly on and off.

3) Hold down the transmitter's Pair button for about 5 seconds. Release the Pair button when the transmitter's Power/Pairing LED begins to flash rapidly (twice per second). It should now be blinking quickly and steadily twice per second. If it is blinking
much more than 2 times per second, the button was held for much too long (15+ seconds), and you must start over from Step 2.

4) With the headset still powered off, hold down the headset's Power button for about 6 seconds until you hear a second set of two beeps. The headset's Power LED should now be blinking rapidly like the transmitter (twice per second).

Note: The LED should not be double blinking (two quick blinks followed by a pause). If it is double blinking, then the button was not held long enough, and you must start over from Step 1.

5) Wait about 10 to 15 seconds. The transmitter's Power/Pairing LED should be solid, and the headset's Power LED should now be flashing steadily once per second.

The headset is now paired to the transmitter and is ready to play game audio.

How do I know if my headset and transmitter are in pairing mode?

The transmitter has three different "flashing" patterns. It can be "Pulsing" on and off, which indicates that it is not paired. If you hold the PAIR button for 5 seconds, it will start blinking 2 times a second at an even rate. This is pairing mode.

If you hold the button upwards of 15 seconds, it will start blinking extremely quickly and the transmitter will leave pairing mode. This is not the correct pairing mode. Unplug the transmitter's USB cable if it's gone this far to "reset" the transmitter.

If the headset is paired and game audio is still not working, double check that all the connections are secure and plugged into the appropriate outputs according to the headset's user guide

My original 360 never worked straight out of the box, second one RDR'd after six months, had one premium and one elite that were both solid and now my slim which has been faultless since launch day.