While watching a movie the reciever shuts itself off after several minutes.

A lot of companies do this. It's because the cost of bandwidth is expensive. They cap you at 57 minutes, usually for a length of time, then allow you to watch their content again.
These type of companies usually have a subscription fee so that you can watch whatever you want for a specific amount of days.
Other than that, you can attempt to use a proxy or use an IP Changer software application.

sounds like you have the polairity reversed on the speakers
and yes it does make a difference
check polairity also make sure unit is well ventelated
you wouldnt use your compouter if it was inside a card board box
so make sure the reciever can breath also
recievers get too hot and they start blowing chips off the board

Sounds like a possible power short, especially if you have speaker cables connected to the receiver but not to speakers -- leaving the ends more likely to short (even via a single thin copper strand across a millimeter or two, when the voltage peaks). The receiver's message says "Check Spkr Cables," right? (They do mean the Speaker Cables!) Most receivers have a built-in power overload detection/protection shut-off circuit to save you from such mistakes.

looseconnections on power supl.board.

Your computer is most likely overheating.

Make sure it is positioned so that none of the vents are blocked on the unit.
Check it with your hand to see if it's overheating, make sure dust is not blocking the vents.
If the issue persists, could be software or a failed cooling system on the unit.

getting hot and shutting down try to clean it out could be very dusty inside

needs optical blockpart#UuxX22203D  X22203DUX2UX22203D2203D

Its possible that one of the speakers wires are shorting out or touching the case of the unit (leads to protective shutdown).

laser problem just trash it. I got one that have the problem 2 months after purchase and was sent back to manufacturer after another 3 months I'm getting disc error. I guess they have a problem on the laser reading assy