I am putting together a new computer...nothing fancy. When everything is assembled (whether in or out of the case) I get no video display at all. The fans spin up, the leds on the motherboard power on, and the leds in the RAM come on.
ASUS M3A motherboard
AMD 5400+ processor
2 GB Crucial DDR2 PC6400
ASUS EAH3650 512MB Radeon PCI Express 2.0 x16 video card
WD 500GB hard drive
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This probably means there is a connection problem to your USB device you are connecting to the output. I would first try another cable, and if that still doesn't work then I would open the case (if not under warranty) and look around the USB connector on the board. Look for any cold joints in the solder and I would actually resolder those pins to the board. You can remove solder with desoldering braid (Radio Shack) and then apply new solder with lead-free rosin core electrical solder.
Your fan speeds up and slows down in response to temperature inside the computer. More so the CPU.
I would suggest getting a can of compressed air made for computers
take it outside, take of the side and blow all the gunk out of there, Really go to town around the fan (you might want to wear eye protection) While you are in there just check that the CPU cooler itself is not loose
If it is it will have to be re-seated.
If it needs re-seating don't just take it off and put it back on as that might make things worse with your temperature problem they have to be cleaned and new thermal grease put on ($2-5)
DON'T remove the CPU just the fan/cooler assembly.
You must clean both the surfaces without scraping anything off. Use isopropynol alcohol and cotton bud sticks until both surfaces are clean, you can use your finger nail to scrape harder residue if you wish but nothing else.
DON'T pour the alcohol over the CPU
Now apply some new thermal grease (most computer shops have it)
Be careful about how much you put on
Here are some basic instructions Once you have re-assembled your cooler and re-connected it check everything is OK and power up the computer.
If everything went to plan you should now be back in business
1. Unplug everything
2. Remove and jewwrely, watches, etc..
3. Set computer on a level table
4. Before opening the case, touch metal on the case for 15 seconds.
5. remove the screws, Take out old videocard and be carefull to lift up on the latch if it has one.
6. Take out old RAM by removing each latch on both sides of the RAM.
7. Store videocard & RAM in an antistatic bag if you have one. A cardboard box works too.
8. put in new videocard vertically where old one was and place back screws.
9. Put in the RAM. (May go in hard) Put in the RAM vertically and make sure the latches are secure.
10. Put back on case cover.
11. Turn on computer after plugging everything back in.
12. Done and hopefully it works.
It will cost about $20 - $50 for best buy to do this and will take about 30mins either way.
Having someone at best buy do it is a better choice if you have never done it before but its your call.