Replaced psu on emachines 220. Worked for 5 minutes then got usb overload message

This is most likely do to a failing power supply. Replace it and you should be back in business. You can buy them online for as little as $12. Also youtube Install PSU and there are tons of videos on how to install them. Should only take about 5 - 10 minutes.

Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your "((MOTHERBOARD TO THE HARD DRIVE))" make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error hope this helps

You can try a new PSU with at least 350 watts and that will determine as to whether the PSU is blown.n I'm suprised that a simple card reader would have blown the supply though, I wonder if you have managed to short out the board somehow. I can understand the USB controller chip being blown, but that and the audio too suggests that the power regulation has overloaded the motherboard

YOUR PSU (POWER SUPPLY UNIT) MAYBE THE CULPRIT. If the power to your cable which fits the computer is ok, then the supply unit is usually at fault. You can buy these pretty cheaply on ebay and they are very easy to fit, or if you are not into that find a mate who can! beleive me... its pretty easy.

GO THREW THE USB PORT THAT HOW I DID TI

Had the same problem and ended up replacing the PSU. Try re-seating the memory and video card first but if your not getting any power on beep codes then it is likely that the PSU and possibly the motherboard have failed (google emachines power supply failure).
Try a new PSU, it worked for me and was a fairly cheap fix if nothing else works.

Check the CPU fan, it may be faulty and causes the CPU to overheat and shut down.

plz chenge your Charge