Ok her is a quick rundown. I built a computer that was running fine for about three months now. Then the PSU went and I had to replace it with a new one. I got an Antec PSU with two cooling fans in it. One on the bottom and oen going out the back. I put it in and started the PC fine. It worked for one night then all of a sudden I get a pop up from the Asus Probe saying all the fans are below threshold. I can hear the fans running and so I decide to reboot the machine. BAM The PC will not boot. I get the check lights that come on for the DVD and CD drive and the Fans spin, but no post it just sits there. Sometimes the monitor gets a signal, and sometimes the monitor will not get a signal. Most of the time now it will not get a signal. When I do get a signal it did once and poped up a message saying to the effect the settings on the bios are inocrrect and go into the bios to fix it. I tried to go into the bios, but now I cannot even get that far. Do you all have any help ?? Did my Processor blow or anything I am at an absolute loss. Thanks so much

Could be the processor maybe?? could be the motherboard too. Perhaps a mains electricity or phoneline spike (caused by a storm, power station fault etc)? I bought one of those Belkin surge protector multi-adapters because the halogen lamp on my desk used to kick out a lot of mains interference and make my computer pop when I turned the lamp on or off. The surge protector sorted it. It was only about £20 and it came with a £20,000 guarantee for any electrical equipment that gets damaged whilst attached to it. They also have smoothing capacitors on-board, to keep the mains output reasonably stable. What you could do is order a processor and motherboard from an online stockist, try it, if the problem persists then it's something else and you might as well RMA (send back) the parts for a refund (just make up a reason, like you don't need it because the person you ordered it for changed their minds or something), if the problem is solved, there you have it! AMD Athlon XP2200+ Aero7 lite 512mb Crucial pc2700 Abit NF7-s V2.0 80GB Seagate SATA 120GB Seagate SATA Geforce4 Ti4200 128mb Benq FP767-12 17" 12ms SB live 5.1 Digital

List your specs.All hardware. Are there any bios beeps? Is your Graphics card seated properly? give us more info nf7-s v2.0 jou jye 550w psu Thermalright SP 97 xp2500-m@200x11 fx5600@360&600 Thermaltake Lanfire WDCaviar 60gb Seagate Barracuda 80gb ;~}

Yes, more info. This still sounds like a power supply. Exactly what psu is the new Antec? Skip

Ok here are smoe specs. AMD Athlon XP 2500+ Asus MotherBoard A7n8x-e Deluxe (has on board sound and lan connections) Kingston 512MB RAM ATI Radeon AIW 9000 Vid card Toshiba DVD ROM Drive (Main) LG CDRW Drive (Slave) Western Digital 10 gig 5400RPM Harddrive (Main) Western Digital 20 gig 7400RPM Harddrive(Slave/games) Antec 400 Watt Power Suppply 6 output Dual Fan cooled -this is from the compusa website which I picked it up from for the power supply.... SL400 is a 400 Watt 6-output, dual fan-cooled ATX (Baby AT or PS/2 Size) power supply designed for personal computer or industrial applications that use the most recent processing technology which requires +3.3V output, +5V AC-On Standby and Logic On/Off control. SmartPower: runs cooler and quieter ATX12Vcompliant for compatibility with AMD™ and Intel® systems L5.9" x W5.5" x H3.4" +5V Stand-By & Logic On/Off Dual Cooling Fans As for checking the graphics card... I dont have a reason to suspect that since it worked the night before with the new power supply in it. Then it went bye bye. I will try to reseat the graphics card tonight to see if that will help. Thanks again for all the suggestions. As for bios beeps ... last night got it to show the asus splash screen but then tried to enter the bios and it just hung. The screen was blank with a single blinking cursor in the left corner. Stayed that way until I had to cut the main power on the PSU. Then tried to boot again and the screen did not even get a signal and it just ran like it did before... fans spin and check lights for the dvd and cd go on but no boot up no beeps no Asus POST reporter... nothing. Thanks!

Don't see anything wrong with the SL400 psu. Some things to try. Check that everything is properly seated and plugged in. It is possible you bumped something when changing the psu. Insure the cpu fan is spinning Insure the 4 pin 12v power connector is plugged in (check all the psu connections). Try the rig in a room that is on a different electrical circuit. All this assuming the new psu is, in fact, not defective. Skip

Check the small battery on the mobo?Better still,just put a new one in. Do you turn your pooter off at night? Generally electrical components don't like going from hot to cold to hot to cold.....With all the expanding then contracting welds can tend to crack.Unlikely option in your case. Have you checked the monitor? nf7-s v2.0 jou jye 550w psu Thermalright SP 97 xp2500-m@200x11 fx5600@360&600 Thermaltake Lanfire WDCaviar 60gb Seagate Barracuda 80gb ;~}