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Computer Has Many Problems

Last response: in Components
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December 8, 2010 7:19:59 PM

My Computer Build:
*BIOSTAR A770E3 AM3 AMD 770 ATX AMD Motherboard
*AMD Athlon II X3 450 Rana 3.2GHz Socket AM3 95W Triple-Core Desktop Processor ADX450WFGMBOX
*CORSAIR 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 Desktop Memory Model CMV4GX3M2A1333C9
*Rosewill DESTROYER Black Gaming ATX Mid Tower Computer Case
*WD Caviar 500GB Serial ATA HD 7200/16MB/SATA-3G
*SAPPHIRE 100293DP Radeon HD 5570 1GB 128-bit DDR3 PCI Express 2.1 x16
*Thermaltake TR2 W0379RU 500W ATX 12V v2.2 Power Supply
*Generic CD Drive
*5 Fans all 120 and default CPU fan

I hooked everything up and I'm sure everything is hooked up properly
At first when I turned on the Comp it immediately shut down. So then I switched the red switch behind the power supply from 115 to 230. It turned the "computer on" but nothing was working. Let me elaborate. The fans turned on fine but nothing was being displayed I wasn't sure if the hard drive was working and the generic CD Drive wouldn't open. But the fans were working. I wasn't sure if it was just a problem with the video card or if the power supply is not giving enough power. Could someone let me know if my build is functional and if not let me know what the problem is?

THanks

More about : computer problems

December 8, 2010 7:21:04 PM

OH btw these are all made from scratch so everything is new except the CD Drive
a c 144 ) Power supply
December 8, 2010 7:45:30 PM

Where are you?

If you plug a PSU set to 230 volts into 115 volts, nothing bad will happen. It just will not work. If you plug a PSU set to 115 volts into 230 volts, you will fry something.

A well designed, modern 500 watt PSU will easily power your system. (Hint - a PSU with a voltage selector switch is not a modern power supply.)

Work through our standard checklist and troubleshooting thread:
http://www.tomshardware.com/forum/261145-31-read-postin...
I mean work through, not just read over it. We spent a lot of time on this. It should find most of the problems.

If not, continue.

I have tested the following beep patterns on Gigabyte, eVGA, and ECS motherboards. Other BIOS' may be different.

Breadboard - that will help isolate any kind of case problem you might have.
http://www.tomshardware.com/forum/262730-31-breadboardi...

Breadboard with just motherboard, CPU & HSF, case speaker, and PSU.

Make sure you plug the CPU power cable in. The system will not boot without it.

I always breadboard a new build. It takes only a few minutes, and you know you are putting good parts in the case once you are finished.

You can turn on the PC by momentarily shorting the two pins that the case power switch goes to. You should hear a series of long, single beeps indicating memory problems. Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU. Remember, at this time, you do not have a graphics card installed so the load on your PSU will be reduced.

If no beeps:
Running fans and drives and motherboard LED's do not necessarily indicate a good PSU. In the absence of a single short beep, they also do not indicate that the system is booting.

At this point, you can sort of check the PSU. Try to borrow a known good PSU of around 550 - 600 watts. That will power just about any system with a single GPU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.

The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.

You can turn on the PSU by completely disconnecting the PSU and using a paperclip or jumper wire to short the green wire to one of the neighboring black wires.
http://www.youtube.com/watch?v=5FWXgQSokF4&feature=yout...

A way that might be easier is to use the main power plug. Working from the back of the plug where the wires come out, use a bare paperclip to short between the green wire and one of the neighboring black wires. That will do the same thing with an installed PSU. It is also an easy way to bypass a questionable case power switch.

This checks the PSU under no load conditions, so it is not completely reliable. But if it can not pass this, it is dead. Then repeat the checks with the PSU plugged into the computer to put a load on the PSU.

If the system beeps:
If it looks like the PSU is good, install a memory stick. Boot. Beep pattern should change to one long and several short beeps indicating a missing graphics card.

Silence or long single beeps indicate a problem with the memory.

Insert the video card and connect any necessary PCIe power connectors. Boot. At this point, the system should POST successfully (a single short beep). Notice that you do not need keyboard, mouse, monitor, or drives to successfully POST.
At this point, if the system doesn't work, it's either the video card or an inadequate PSU. Or rarely - the motherboard's PCIe interface.

Now start connecting the rest of the devices starting with the monitor, then keyboard and mouse, then the rest of the devices, testing after each step. It's possible that you can pass the POST with a defective video card. The POST routines can only check the video interface. It cannot check the internal parts of the video card.


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December 8, 2010 9:16:19 PM

where am i? like where I live? in Los Angeles. I'm not understanding the 230 and 115V comment.
a b ) Power supply
December 8, 2010 9:48:08 PM

If you live in LA it's very unlikely you are plugged into a 230VAC outlet so switch your PSU back to 115 first.
December 8, 2010 10:21:17 PM

THank you I got my gear to work and currently installing windows 7

Can someone still clarify what the difference b/w 230V and 115V switch is in the back and what their function is?
December 8, 2010 10:22:20 PM

oh thanks i didn't see the post
Yeah i think it worked once I switched it back to 115
thanks everyone
!