New CPU+Mobo problem , Blank Screen (no signal) and no beep

Airforce · 07-18-2008, 01:13 AM

So my friend bought a new CPU and Motherboard , as he replaced old parts with new , PC stopped working , now PC will start , all fans will spin , but here is no beep on start & monitor has no signal (just black screen).

New specs are following :
ASUS P5K P35/ICH9
INTEL Core 2 Duo E4600 (2,4 GHz, 2MB L2 cache....)
ATI x1950Pro 256 MB 256 BIT
2x 1GB ram (good ram + kingston) 667 MHz
480W Power Supply & 350W Fortron (he tried both , no change)
160 GB ATA HDD

He tried resetting CMOS , didnt help , also he rebuilded it again , no change... When he use old CPU + MOBO PC is working again. So it isnt monitor problem...

I tried all i could, my friend also did so any help is appreciated.

Houndog777 · 07-18-2008, 02:56 AM

Have you tried the video card and memory in a different mobo?

Airforce · 07-18-2008, 02:57 AM

Quote:

Originally Posted by Houndog777

Have you tried the video card and memory in a different mobo?

yes , memory and video card are working in old mobo.

Houndog777 · 07-18-2008, 03:05 AM

Did it ever work, or is this just a new problem?
Ensure the motherboard battery is good and inserted properly, and also ensure all connections are properly made. Are you giving the processor and video card extra power via 6-pin PCIe and 4-pin ATX connectors?
Also check that any jumpers are in their correct positions.

Airforce · 07-18-2008, 03:23 AM

Quote:

Originally Posted by Houndog777

Did it ever work, or is this just a new problem?
Ensure the motherboard battery is good and inserted properly, and also ensure all connections are properly made. Are you giving the processor and video card extra power via 6-pin PCIe and 4-pin ATX connectors?
Also check that any jumpers are in their correct positions.

It never worked, and yep 6pin PCIe and 4pin ATX are connected. All jumpers are in default position according to manual. Battery is inserted properly.

Tumbleweed36 · 07-18-2008, 04:05 AM

Are you trying to use a new motherboard and CPU with an old hard drive with an OS on it? Simply will not work most of the time because of the old motherboard chipset drivers on there. I am however, concerned there is no post beep.

Try one stick of ram only, then try the other. With that motherboard, are you sure that you have snapped down the CPU clear in? Sometimes one leg can fool you and not be snapped clear down. The CPU/Heatsink have to be snapped down very tight for it to post. Have you made sure you have the +12 molex plugged in to this board?

If all else fails:

Bench Test Your System

Airforce · 07-18-2008, 04:11 AM

Quote:

Originally Posted by Tumbleweed36

Are you trying to use a new motherboard and CPU with an old hard drive with an OS on it? Simply will not work most of the time because of the old motherboard chipset drivers on there. I am however, concerned there is no post beep.

Try one stick of ram only, then try the other. With that motherboard, are you sure that you have snapped down the CPU clear in? Sometimes one leg can fool you and not be snapped clear down. The CPU/Heatsink have to be snapped down very tight for it to post. Have you made sure you have the +12 molex plugged in to this board?

If all else fails:

Bench Test Your System

Yep he has hdd with old winXP and drivers in PC (but swapping mobo and cpu worked for me in past without formatting driver or even reinstalling OS). CPU/Heatsink is mounted correctly. And all (needed)cables are plugged in.

So ill try that link....

Tumbleweed36 · 07-18-2008, 04:18 AM

Some times you can swap them, but more often you have to do either a repair install or a new install to have them work. Like I mentioned, the thing that bothers me is that you can't get by post which you should, regardless of that issue. When you take all ram out, does it beep like crazy?????

Airforce · 07-18-2008, 04:23 AM

Quote:

Originally Posted by Tumbleweed36

Some times you can swap them, but more often you have to do either a repair install or a new install to have them work. Like I mentioned, the thing that bothers me is that you can't get by post which you should, regardless of that issue. When you take all ram out, does it beep like crazy?????

Nope it doesnt beep even without ram.

~~OMGmissinglink~~ · 07-18-2008, 10:34 AM

is the cmos jumper set on clear cmos?

Airforce · 07-18-2008, 01:11 PM

Quote:

Originally Posted by OMGmissinglink

is the cmos jumper set on clear cmos?

nope its in "default" position.

Tumbleweed36 · 07-18-2008, 06:51 PM

No beep with no memory, look for a bad motherboard a good bit of the time.

Houndog777 · 07-19-2008, 01:58 AM

Hi, have tried yet to boot with minimal components? Just the processor, minimum memory and video card to see if you can at least get a display and into BIOS.

Airforce · 07-19-2008, 02:19 AM

Quote:

Originally Posted by Houndog777

Hi, have tried yet to boot with minimal components? Just the processor, minimum memory and video card to see if you can at least get a display and into BIOS.

Yes, it didnt work. Looks like mobo is bad , well friend is going to test new ram , if that wont help , i think there is nothing we can do...

thx for help everyone

dai · 07-19-2008, 06:55 AM

p5k
http://www.newegg.com/Product/Produc...corsair%2b550w

Airforce · 07-19-2008, 09:38 AM

Quote:

Originally Posted by dai

p5k
http://www.newegg.com/Product/Produc...corsair%2b550w

It has nothing to do with power supply , PC works when he used AMD Mobo + AMD X2 4800+ , and he tried both PSUs...

~~OMGmissinglink~~ · 07-19-2008, 09:58 AM

No beeping without ram installed = bad mobo, is there a speaker pluged on the mobo?

07-18-2008, 01:13 AM	#1 (permalink)
Airforce Registered User Join Date: Jul 2008 Posts: 8 OS: WinXP SP2	New CPU+Mobo problem , Blank Screen (no signal) and no beep So my friend bought a new CPU and Motherboard , as he replaced old parts with new , PC stopped working , now PC will start , all fans will spin , but here is no beep on start & monitor has no signal (just black screen). New specs are following : ASUS P5K P35/ICH9 INTEL Core 2 Duo E4600 (2,4 GHz, 2MB L2 cache....) ATI x1950Pro 256 MB 256 BIT 2x 1GB ram (good ram + kingston) 667 MHz 480W Power Supply & 350W Fortron (he tried both , no change) 160 GB ATA HDD He tried resetting CMOS , didnt help , also he rebuilded it again , no change... When he use old CPU + MOBO PC is working again. So it isnt monitor problem... I tried all i could, my friend also did so any help is appreciated.

07-18-2008, 02:56 AM	#2 (permalink)
Houndog777 Tech Hardware TEam Join Date: May 2007 Location: Scotland, UK Posts: 2,663 OS: XPpro sp3 My System	Re: New CPU+Mobo problem , Blank Screen (no signal) and no beep Have you tried the video card and memory in a different mobo? __________________ Last edited by Houndog777 : 07-18-2008 at 02:56 AM. Reason: Add

07-18-2008, 03:05 AM	#4 (permalink)
Houndog777 Tech Hardware TEam Join Date: May 2007 Location: Scotland, UK Posts: 2,663 OS: XPpro sp3 My System	Re: New CPU+Mobo problem , Blank Screen (no signal) and no beep Did it ever work, or is this just a new problem? Ensure the motherboard battery is good and inserted properly, and also ensure all connections are properly made. Are you giving the processor and video card extra power via 6-pin PCIe and 4-pin ATX connectors? Also check that any jumpers are in their correct positions. __________________ Last edited by Houndog777 : 07-18-2008 at 03:06 AM. Reason: Add

07-18-2008, 04:05 AM	#6 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 13,447 OS: XP Professional	Re: New CPU+Mobo problem , Blank Screen (no signal) and no beep Are you trying to use a new motherboard and CPU with an old hard drive with an OS on it? Simply will not work most of the time because of the old motherboard chipset drivers on there. I am however, concerned there is no post beep. Try one stick of ram only, then try the other. With that motherboard, are you sure that you have snapped down the CPU clear in? Sometimes one leg can fool you and not be snapped clear down. The CPU/Heatsink have to be snapped down very tight for it to post. Have you made sure you have the +12 molex plugged in to this board? If all else fails: Bench Test Your System __________________ ----------

07-18-2008, 04:18 AM	#8 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 13,447 OS: XP Professional	Re: New CPU+Mobo problem , Blank Screen (no signal) and no beep Some times you can swap them, but more often you have to do either a repair install or a new install to have them work. Like I mentioned, the thing that bothers me is that you can't get by post which you should, regardless of that issue. When you take all ram out, does it beep like crazy????? __________________ ----------

07-18-2008, 10:34 AM	#10 (permalink)
~~OMGmissinglink~~ Troubled Join Date: Sep 2006 Posts: 1,535 OS: XP Pro sp2 My System	Re: New CPU+Mobo problem , Blank Screen (no signal) and no beep is the cmos jumper set on clear cmos?

07-18-2008, 06:51 PM	#12 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 13,447 OS: XP Professional	Re: New CPU+Mobo problem , Blank Screen (no signal) and no beep No beep with no memory, look for a bad motherboard a good bit of the time. __________________ ----------

07-19-2008, 01:58 AM	#13 (permalink)
Houndog777 Tech Hardware TEam Join Date: May 2007 Location: Scotland, UK Posts: 2,663 OS: XPpro sp3 My System	Re: New CPU+Mobo problem , Blank Screen (no signal) and no beep Hi, have tried yet to boot with minimal components? Just the processor, minimum memory and video card to see if you can at least get a display and into BIOS. __________________

07-19-2008, 06:55 AM	#15 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 40,008 OS: vista 32x ultimate retail	Re: New CPU+Mobo problem , Blank Screen (no signal) and no beep p5k http://www.newegg.com/Product/Produc...corsair%2b550w __________________

07-19-2008, 09:58 AM	#17 (permalink)
~~OMGmissinglink~~ Troubled Join Date: Sep 2006 Posts: 1,535 OS: XP Pro sp2 My System	Re: New CPU+Mobo problem , Blank Screen (no signal) and no beep No beeping without ram installed = bad mobo, is there a speaker pluged on the mobo?