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New Pc wont Boot

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I need some help. I just finished piecing together a new pc for a friend with new parts bought from reliable sources. Here are the specs: mobo=Ecs p4vxasd2 ver 5.0 with a 1.7 celeron 400mhz fsb. 512mb DDR 266 stick. WD 80gig ata 133 7200rpm 8meg cache. Palit 5200fx ultra 128meg ddr vid card. standard floppy and cdrom. All jumpers have been set for DDR and the voltage is set also. The cpu clock is set at 100mhz to support 400fsb. And now for the problem. Everything powers up however I do not get a signal to my monitor or to my keyboard or mouse. I also do not get any beeps ....indicating a problem with the memory or video. I have tried just about everything and I refuse to be defeated. Anyone with something maybe Ive overlooked? All cables are correct power supply is 350watt. Thanks

12 replies

by bschmidt

This may sound dumb, but it happened to me about 2 or 3 weeks ago. Make sure the power supply is set up for 110V instead of 220V. I tried everything I could think of but got no response from BIOS, no beeps, nothing. The HDD didn't even start up, but everything else did. Turns out the power supply switch on the back was somehow set to 220V and the system couldn't handle it.

(for mine, I could boot successfully with no HDD)

by hd1912

Thanks for the tip but thats one of the first things i looked for ....i made sure it was set at 115v.

by thechas

Check the CMOS clear jumper. Many motherboards are shipping with the jumper set to clear, and the PC will not boot if the jumper is set to clear.

As a side note, if you plan to install Windows 98 or Me on this system, you may run into problems with 512MB of RAM. There is a 'bug' in the core 9X code that can cause some strange problems with more than 511MB of RAM.

Chas

by hd1912

Thanks but i checked that also. I actually tried to clear the cmos in hopes it might actually boot. But no luck.

by bohicam1

Chances are the video card is not seated properly. I have had alot of probs recently with different cases and new cards. Try leaving the mounting screw out and the side panel off the case. Try reseating the card, Try the card in another machine or try a different card in this computer.
Good luck!

Mike

by thechas

With what you have tried already, and NO POST beeps, I would swap in a different CPU.

Other ideas:

Does the power supply have the extra connector for P-IV motherboards, and is it connected?
Aux 12 V

Remove the CMOS battery and unplug the power cord for at least 1/2 hour.
Try to startup and if it does startup, enter BIOS settings and set the CPU speed.
Then re-install the battery.

Chas

by michaeltubs

Two possible answers that might help, some motherboards require dual ddr ram to operate therefore check specs for the motherboard and memory config.
if the MB has a video card inbuilt the cmos may be defaulted to run on it. If so plug monitor into MB video.

Hope it helps.

by jedurham36

Pull all the cards, drives, etc. out of the box. Power it on, It should beep a few times. then put the cards in one at a time and power it on each time. When you put a card in and it won't boot, thae last card is the problem.
I also agree that you should check and make sure that power supply is set to 110V, and the power connections from the power supply to the mobo are seated properly.

by tech_wiz03

Last post is correct. first try and do an out of box staged power-up. If it won't go out of box, you may have defective hardware. If it works out of box, carefully check then nylon or neoprene spacers are used on stand-offs. ECS mobo's require them where other mobo's can get away without. also most ECS mobo's have on-board devices which you must take into consideration when building the system. Typically, on-board video if enabled will prevent secondary video card(s) from being used during post. If this is case plug monitor into onboard video and use to configure bios with secondary cards out of circuit.

regards
rick

by mark

If you are going to put PCs together, you really need a POST card. It will tell you if there is any activity and if it hangs it will give you a code that tells you what it's hanging on. Most common things are video and memory. Pull all cards out and unplug all drives while troubleshooting a mainboard that won't POST. Also clear the CMOS and try booting again. I recommend http://www.ultra-x.com for diag equipment.

by timwalsh

Start here:

According to the User's manual for your motherboard (from the ECS website), it has an AGP 4X slot.

According to the specs for your video card (from the Palit website), it is an AGP 8X card.

You need a video card that is compatible with your motherboard (i.e. AGP 4X).

by csmith

We keep "Known Good" PCI and ISA Video cards for just such problems, as well as "Known Good" memory.
First test: Put in a PCI video card . (If the BIOS defaults to PCI, and AGP is installed, some systems lock.)
No Fix?
Second test: Put in different memory.
No Fix?
Check Power Supply signals. (Voltages)

Regards, Chris

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