My red light sensor is blinking constantly and the green light sensor is steady. I grab hold of the red light sensor and squeeze and the light goes solid and I am able to close the garage door. when i let loose of the sensor it start blinking again. all wires on the outside seem to be fine.

Here's a guide;
What do the battery lights mean on my mouse? Some keyboard and mouse models feature a battery light that shows the current status of the batteries. The following table describes the different lights and states.
Light
Device Model Status Single long green blink Rechargeable Batteries are good. This occurs when batteries are first installed or every time that the device is turned on. Slow green blink Rechargeable Device is docked in the charging station and is charging properly. Steady green Rechargeable Device is docked in the charging station and does not need additional charging. Steady green Presenter Mouse (Japanese version) Laser pointer is on. Red/green blink Wireless Device is discoverable (trying to connect to the transceiver). Slow red blink Non-rechargeable Batteries are low and need to be replaced. Slow red blink Rechargeable Batteries are low and need recharging. Fast red blink Rechargeable Device is docked in the charging station, but there is a charging error.
Reasons for errors: The wrong type of battery is installed; the battery or batteries are missing; or the battery connection is bad.
Solutions: Make sure that the correct battery or batteries are installed, and are installed correctly. If necessary, remove the batteries, wipe them with a clean cloth, and reinsert them. Steady red Presenter Mouse (Standard version) Laser pointer is on.

Sounds like a startup self test. All wireless devices go through a power on self test. Does it connect? You can connect to it and go online? I rarely turn mine off, only in a electrical storm.

Anytime the main light flashes 10 times and the door reverses to the open position it is a door sensor problem. If the transmitting sensor light is blinking it is bad.

This is a common problem caused by a busted bulb. Please replace the bulb of your TV set.

Is the projector receiving a source signal? if not it will power itself down after whatever time you have it set to do so when no signal is present.
Just an idea?

you have to keep moving the sensors until the light stays on steady green not blinking. one is a sending the other is the receiver. If the lights are on steady green they should show an unbroken line of sight. I have a smiliar problem and have the sensors duct taped together with the green light on constantly and it still won't go down. but firts try and get the green lights to stay on...hope this helps don

Open the document feeder and check to see if there are pieces of paper stuck in the rollers.

try pressing and holding the enter button on the projector for about 30 seconds - this resets it. It worked for me!!

Sounds like the machine thinks it is overheating. It may be actually over heating or It might just be a bad temp sensor. It can also be the Power Control Board if not the temp sensor.

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