when I try to turn on the computer, the fan on the case and the computer light turn on for a second. I swapped out my current psu, hiper 480w, and replaced it with the one the computer originally came with. The computer then turns on, but the monitor doesn't show anything and there is no signal. Could my mobo be messed up? and also the hiper psu might be gone too?

Video card or onboard? Reseat the card and double check all the wiring in case you missed a plug or knocked something loose. If you disconnected the monitor to change the ps, check the connection for bent pins and make sure the connection's solid
Mark

What kind of computer is it and what all do you have installed? Drives, fans, Video cards etc..

so your pc doesnt work with either psu??

goodluck...

im using the onboard card to try and diagnose the problem. its an emachines t3522 with an added ram and a geforce 7900gs. if i use my old one the computer actually turns on but the monitor stays off, whereas with the other psu nothing turns on.

ok for the psu that doesnt turn anything on - i beleive its cactus

with the "old one" remove one stick of ram, try to boot, remove vidcard(if there is onboard video), try to boot, etc do this, keep removing componenets until you are left with bare essentials.

goodluck

There is a good chance its the psu and the motherboard. E-machines are notorious for this problem, I have personally repaired several machines. Sounds like they are both shot

okay its not the ram, its not the hd, im using the onboard video card, stock psu, only thing i havent checked was the mobo or processor which im guessing is the problem. the "broken" psu im going thru warranty to get that fixed and im about to give up and just buy a new mobo/processor.


also for buying a new mobo/processor ive never had ne experience with it. do i need to get one that is compatible to my ram and psu?

what kinda ram do you have?what is tha max. watt rating your psu is rated at?

goodluck

THIS is your computer. He/She has a Celeron D processor (most likely LGA 775 since the socket 478 does not have 64 bit support, not positive though) 512 MB of DDR2 PC4200 memory. The computer only shipped with a 300 watt power supply, if you have added ANYTHING even a cd/rom drive or a mild video card this is too much for the power supply. You will need to get a bigger one to prevent it from failing again. Start with the power supply and go from there remove anything you added and see if the computer boots. If it does upgrade to a larger power supply. If it doesn't you will need to get a new motherboard. Before you order a MB check the socket and make sure its LGA 775.

sorry this is offtopic: but what exactly is emachines? is it a hp/compaq/dell/acer equivalent, of low quality? i have heard alot of flaming towards them (in regards to low quality/failing parts etc)

emachines i think is owned by gateway? not sure but its horrid. been having problems since day 1. in regards to sneakycyber i took out everything that i added when im using the stock 300w psu. so the computer is how it came when i first bought it but the comptuer only boots and the monitor still gets a no signal

also if i need to get a new mobo what kind should i get?

psu: hiper 480w
video card: geforce 7900 gs pci-e
ram: 2x512 pc4200]


i need to make it compatible with these components? budget around 200-250

eMachines used to be a stand alone builder of computers similar to Packard Bell. Both used proprietary hardware/software of questionable quality and ZERO customer support. After going out of business, I believe they were resurrected in the UK until Gateway bought them out. Although showing some improvement, they had a period where, when a power supply failed, it took out the whole system. There were quite a few
Mark

You can save some money and get more bang for the buck with an AMD processor instead of Intel
Mark

I had one emachine I reloaded and tried to fix, it was out of a walmart auction, about a year later I spent many hours
figuring out the motherboard and cpu simultanously selfdestructed, I decided I would never waste my time with one again.

At one time they had a good product.

I guess the problem is laying on some beach somewhere thinking what suckers we are?

aahh i see..

i dont beleive that we aussies have them over here...unless they have just been rebranded :S

but thats not saying that we dont have our fair share of crap PC manufactures...

i thought intel dual core is better than amd?

That's up for debate. You'll find people on both sides of the fence. It ends up being your choice. You mentioned price was a concern. That's why I suggested AMD
Mark

hmm then amd wise what is a good suggestion?

http://www.newegg.com/Product/Product.aspx...N82E16819103774

but this time use a reliable motherboard

like asus

might have a problem putting in your old case?

yeh i think im just gonna have to build a whole new one. after doing some research i came up with these parts. mind you this is my first time doing such a thing.

ram: G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)
http://www.newegg.com/Product/Product.aspx...N82E16820231098

mobo:ASUS M2NBP-VM CSM AM2 NVIDIA Quadro NVS 210S Micro ATX AMD Motherboard
http://www.newegg.com/Product/Product.aspx...-_-NA-_-NA-_-NA

processor:AMD Athlon 64 X2 4000+ Brisbane 2.1GHz 2 x 512KB L2 Cache Socket AM2 65W Dual-Core Processor
http://www.newegg.com/Product/Product.aspx...N82E16819103774

video card: PNY VCG7900SXPB GeForce 7900GS 256MB 256-bit GDDR3 PCI Express x16 SLI Supported Video Card
http://www.newegg.com/Product/Product.aspx...N82E16814133186

psu: HIPER HPU-4M480-PS ATX12V v2.2 480W Power Supply 100 - 120V AC
http://www.newegg.com/Product/Product.aspx...pk=hiper%2b480w

The psu and video card are from before. Do i need to buy a heat sink or anything?

You will need a socket AM2 heatsink and fan and if possible, I'd stay away from ECS (my opinion)
Mark

Please, Please, Please don't buy an ECS board, They are not reliable and are not built very well, you will be plagued with problems. ECS

ECS, can we make that 3 votes against that choice? penny wise pound foolish

Biostar is another one I will never mess with again

the retail cpu's come with Heatsink&fan

what about this asus board?

ASUS M2NBP-VM CSM AM2 NVIDIA Quadro NVS 210S Micro ATX AMD Motherboard
http://www.newegg.com/Product/Product.aspx...N82E16813131072

also do my ram match? and do i need to get a new psu or is the 480w enough? and how can i tell if the board will fit into my case?

according to asus the old ram will work? but the new ram will make it a lot faster

the hiper should be good also they make some of the best power supplies

measure your old motherboard, I would go with a standard size if i could and not get onboard video at all

also im guessing that i cant mix and match ram for example use the 2x512 533 and the 2x1gb 800 so that it becomes 3gb? and yeh my old mobo is around 9.5x9.5 so im guessing it will fit.

you have got it right on the money

the computer will be slower with the ram mixed

alright then im hoping everything is good to go and i can buy the new components? god its like im building my own computer. if i knew b4 i wouldnt have bought an emachines

okay so im down to 3 mobos:
ASUS M2N-SLI Deluxe AM2 NVIDIA nForce 570 SLI MCP ATX AMD Motherboard
http://www.newegg.com/Product/Product.aspx...N82E16813131013

DFI CFX3200 M2/G Infinity AM2 ATI CrossFire Radeon Xpress 3200 ATX AMD Motherboard
http://www.newegg.com/Product/Product.aspx...N82E16813136017

ASUS M2NBP-VM CSM AM2 NVIDIA Quadro NVS 210S Micro ATX AMD Motherboard
http://www.newegg.com/Product/Product.aspx...-_-NA-_-NA-_-NA

can they all take ddr2 533? and i have no idea what the difference between any of these mobos are.

atx mobo's are taller, take a taller case

ahh you are far too wise. i have much to learn. so that leaves me with the two asus. any suggestions?