PC not starting after new CPU installed

Kistel · Mar 3, 2011, 05:09 AM

I just installed a new AMD 1090T on a ASUS M3A78 EM motherboard and now my PC is not starting up.

I checked and ensured that all plugs and connectors are connected to my motherboard. I plugged in the PSU cable, and hit the power switch. My motherboard's LED light comes on.

I then press the power button - and nothing. No POST, no beeps, and no fans spin. Only the motherboard light comes on.

This is what I did:

I updated the BIOS prior and the latest BIOS support the 1090T CPU. I've used this PC fine for a month or so with these BIOS.

I turned off my PC, turned off the power and unplugged it. After waiting for a few minutes, I opened it up and unplugged all plugs, video card, PCI cards ect.

I then removed my motherboard. Next I removed a Sunbeam Core Contact 120mm heat sink/fan - this took a bit of effort, had to physically remove motherboard before getting it off.

I then removed my 9950BE and installed my new 1090T and 92mm Xigmatek LOKI heatsink/fan with TX2 thermal compound on my ASUS M3A78 EM.

I am concerned the motherboard might have got damaged during the process of removing and installing my CPU heatsink. But the light on the motherboard comes on when I plug in the power, does that mean it is not a motherboard-related issue?

CyaN1de · Mar 3, 2011, 05:14 AM

Check power switch connector on the mobo perhaps?

Jack Doph · Mar 3, 2011, 05:21 AM

Did you clear the BIOS before turning the system off?
Try a CMOS clear just in case.

EDIT: additionally - did you make sure the CPU power connector is in place?

CrAsHnBuRnXp · Mar 3, 2011, 05:29 AM

Is your old CPU still around? Can you put that into the motherboard and see what result you get with it? If its the same result, check to see if any of the pins in the socket got bent. If they did, carefully try and straighten it out. If you break the pin, the motherboard is FUBAR.

If the old CPU produces the same results as the new CPU, try installing everything on cardboard outside of the case and boot up and see what happens. If it boots up fine, you had a short going from the case to the motherboard.

Kistel · Mar 3, 2011, 05:36 AM

I double checked the system panel connector for power and reset, and found I had installed them incorrectly. Now the system starts, the fans power up but there is no POST.

CyaN1de · Mar 3, 2011, 05:41 AM

As stated clear CMOS.

Remove any unnecessary equipment such as storage drives, optical drive etc.

Use 1 RAM stick in first slot if using more than 1 stick at the moment. If still no post, try the 1 stick in each slot. If still no post, try another stick of RAM. (I had this problem recently with RAM not playing nice with the mobo).

Kistel · Mar 3, 2011, 05:44 AM

Quote:

Originally Posted by CyaN1de

As stated clear CMOS.

Remove any unnecessary equipment such as storage drives, optical drive etc.

Use 1 RAM stick in first slot if using more than 1 stick at the moment. If still no post, try the 1 stick in each slot. If still no post, try another stick of RAM. (I had this problem recently with RAM not playing nice with the mobo).

How would I clear CMOS exactly? And does this rest the BIOS? If it does, the motherboard won't recognize my 1090T.

Jack Doph · Mar 3, 2011, 05:47 AM

No it won't wipe the BIOS update

All it does is default the BIOS settings to factory default, but you will lose settings like time/date/CPU configuration etc.
The BIOS will then default to a detect setting (if you like), so your hardware will run fine.

There should be a battery on your mobo which you can remove, or alternatively, there's an "clr CMOS" jumper you can use to short it (about 5-10 seconds).
Make sure power is OFF when you clear the CMOS!

Kistel · Mar 3, 2011, 05:52 AM

Ok, I removed all hard drives, video card, and one RAM. Still no POST.

I will try my CMOS next.

But if it is a CPU comparability issue or hardware issue regarding the CPU, would it POST?

Jack Doph · Mar 3, 2011, 05:55 AM

Well, if for some reason the BIOS update didn't work, then your CPU cannot be recognised, so the system will not POST.
However, if you're convinced the BIOS update was successful, then there should be no compatibility issue..

EDIT: you will need to clr CMOS before you can try POSTing without your graphics card

CyaN1de · Mar 3, 2011, 05:59 AM

Quote:

Originally Posted by Jack Doph

Well, if for some reason the BIOS update didn't work, then your CPU cannot be recognised, so the system will not POST.
However, if you're convinced the BIOS update was successful, then there should be no compatibility issue..

EDIT: you will need to clr CMOS before you can try POSTing without your graphics card

He was using Mobo prior with flashed BIOS according to his first post.

I'm assuming your board has OB Video capabilities?

Mine just beeps at me until I put the Vid card back in

Jack Doph · Mar 3, 2011, 06:03 AM

Quote:

Originally Posted by CyaN1de

He was using Mobo prior with flashed BIOS according to his first post.

I'm assuming your board has OB Video capabilities?

Mine just beeps at me until I put the Vid card back in

Just making sure mate.
That mobo has on-board gfx, yes, hence another need to change the BIOS setting to default by the CMOS clr

CrAsHnBuRnXp · Mar 3, 2011, 06:07 AM

Quote:

Originally Posted by Kistel

Ok, I removed all hard drives, video card, and one RAM. Still no POST.

I will try my CMOS next.

But if it is a CPU comparability issue or hardware issue regarding the CPU, would it POST?

How can you see if you POSTed or not if you removed the video card? Have you tried putting the old CPU in like I suggested and see what happens?

Kistel · Mar 3, 2011, 06:09 AM

I will try the old CPU next.

For now, how do I remove my CMOS battery? My manual does not tell me what I must do to pull the battery out. Do I just physically pull it out?

Jack Doph · Mar 3, 2011, 06:18 AM

It's better if you try the CMOS CLR jumper first.
Should be close to the battery itself

Kistel · Mar 3, 2011, 06:29 AM

Quote:

Originally Posted by Jack Doph

It's better if you try the CMOS CLR jumper first.
Should be close to the battery itself

I tried clearing the CMOS through the CLR jumper. That did not work. I can not figure out how to physically remove the CMOS battery.

If there is a psychical issue with the CPU pins, will it even start up?

pantherx12 · Mar 3, 2011, 06:31 AM

Anyone considered that this is a am2/am2+ board?

It probably needs a bios upgrade if it supports 6 cores at all.

Kistel · Mar 3, 2011, 06:32 AM

Quote:

Originally Posted by pantherx12

Anyone considered that this is a am2/am2+ board?

It probably needs a bios upgrade if it supports 6 cores at all.

I've already got the latest BIOS, which according to the ASUS website, support the 1090T.

Jack Doph · Mar 3, 2011, 06:32 AM

If there's a bent or broken pin, then you have no chance of the CPU working, that's correct..
Try the above suggestion of using your old CPU & see if it POSTs then

Kistel · Mar 3, 2011, 06:39 AM

Quote:

Originally Posted by Jack Doph

If there's a bent or broken pin, then you have no chance of the CPU working, that's correct..
Try the above suggestion of using your old CPU & see if it POSTs then

Ok. Going to put the old one in. No bends on the pins for the 9950BE. Removing the heatsink now.

CyaN1de · Mar 3, 2011, 06:43 AM

Quote:

Originally Posted by Kistel

I tried clearing the CMOS through the CLR jumper. That did not work. I can not figure out how to physically remove the CMOS battery.

If there is a psychical issue with the CPU pins, will it even start up?

Did you unplug the power supply, change jumper, wait 10 seconds, return jumper, plug PSU back in? No need to pull the battery if you unplugged the PSU.

Kistel · Mar 3, 2011, 06:47 AM

Quote:

Originally Posted by CyaN1de

Did you unplug the power supply, change jumper, wait 10 seconds, return jumper, plug PSU back in? No need to pull the battery if you unplugged the PSU.

I did all of that. Same result.

I just removed the 1090T - no bends on the pins either. 9950BE is in. It entered POST - but there was a double beep.

Entered in BIOS. I will have to update the BIOS again. Loaded Windows.

Jack Doph · Mar 3, 2011, 06:49 AM

Quote:

Originally Posted by Kistel

I did all of that. Same result.

I just removed the 1090T - no bends on the pins either. 9950BE is in. It entered POST - but there was a double beep.

Entered in BIOS. I will have to update the BIOS again.

Take note of the BIOS version and ensure that it's the same as the latest version.

CyaN1de · Mar 3, 2011, 06:50 AM

Don't you just love computers?

Jack Doph · Mar 3, 2011, 06:51 AM

Quote:

Originally Posted by CyaN1de

Don't you just love computers?

Absolutely! xD
Just a bit of a minor hassle sometimes

Mar 3, 2011, 05:09 AM	#1
Kistel Join Date: Feb 2011 Location: California Posts: 57 (0.07/day) Thanks: 3 Thanked 1 Time in 1 Post System Specs	PC not starting after new CPU installed I just installed a new AMD 1090T on a ASUS M3A78 EM motherboard and now my PC is not starting up. I checked and ensured that all plugs and connectors are connected to my motherboard. I plugged in the PSU cable, and hit the power switch. My motherboard's LED light comes on. I then press the power button - and nothing. No POST, no beeps, and no fans spin. Only the motherboard light comes on. This is what I did: I updated the BIOS prior and the latest BIOS support the 1090T CPU. I've used this PC fine for a month or so with these BIOS. I turned off my PC, turned off the power and unplugged it. After waiting for a few minutes, I opened it up and unplugged all plugs, video card, PCI cards ect. I then removed my motherboard. Next I removed a Sunbeam Core Contact 120mm heat sink/fan - this took a bit of effort, had to physically remove motherboard before getting it off. I then removed my 9950BE and installed my new 1090T and 92mm Xigmatek LOKI heatsink/fan with TX2 thermal compound on my ASUS M3A78 EM. I am concerned the motherboard might have got damaged during the process of removing and installing my CPU heatsink. But the light on the motherboard comes on when I plug in the power, does that mean it is not a motherboard-related issue? Last edited by Kistel; Mar 3, 2011 at 05:43 AM.

System Name:	The Vanguard
Processor:	Phenom X6 1090t@3.5Ghz
Motherboard:	ASUS M4A88T-M
Cooling:	Xigmatek Loki 92mm HSF
Memory:	8.0GB Crucial DDR3
Video Card:	MSI GTX 670 PE
Hard Disk:	2x 1TB Samsung Spinpoint F3
Optical Drive:	Samsung WriteMaster SH-S203B
CRT/LCD Model:	Samsung SyncMaster 24" LED
Case:	Corsair Obsidian 550D
Sound Card:	Gamecom 777 USB 7.1
PSU:	Antec High Current Gamer 750w
Software:	Windows 7 x64 Pro

System Name:	Name? We don't need no stinking name!!
Processor:	AMD Athlon II x4 640
Motherboard:	Asus M4A87TD-USB3
Cooling:	Corsair A70 HSF. 4xCoolermaster A4 120mm LED Fans. 1xCoolermaster A4 140mm LED Fan
Memory:	8GB Mushkin Enhanced Silverline Stiletto PC3-12800 DDR3-1600 9-9-9-24
Video Card:	Zotac GTX 560 Ti OC
Hard Disk:	Many adding up to 2.7TB
Optical Drive:	Samsung SH-S223L/BEBS
CRT/LCD Model:	SyncMaster 205BW
Case:	Coolermaster Elite 310
Sound Card:	OB
PSU:	Enermas 565
Software:	Windows 7 Ultimate

System Name:	Frankenstein v7
Processor:	Intel i7 2600K (@ 4.6GHz/1.32v)
Motherboard:	Asus P8Z68-V
Cooling:	Corsair H100
Memory:	Corsair Vengeance 4x4GB DDR3 @ 1866MHz
Video Card:	Powercolor HD5850 PCS+
Hard Disk:	Crucial M4-64GB SSD (for Intel's SRT) + Samsung F3 1TB HDD + Seagate 1TB HDD
Optical Drive:	Asus DVD-RW (SATA)
CRT/LCD Model:	Samsung B2230 LCD P.O.S.
Case:	Antec P280
Sound Card:	Creative Labs X-Fi Elite Pro
PSU:	Corsair HX850
Software:	Windows 7 Pro - 64-bit

Mar 3, 2011, 05:29 AM	#4
CrAsHnBuRnXp Eligible for custom title Join Date: Oct 2007 Location: United States Posts: 5,090 (2.49/day) Thanks: 453 Thanked 641 Times in 527 Posts System Specs	Is your old CPU still around? Can you put that into the motherboard and see what result you get with it? If its the same result, check to see if any of the pins in the socket got bent. If they did, carefully try and straighten it out. If you break the pin, the motherboard is FUBAR. If the old CPU produces the same results as the new CPU, try installing everything on cardboard outside of the case and boot up and see what happens. If it boots up fine, you had a short going from the case to the motherboard. __________________ Raid Arrays Explained Wanna look up your BSOD code? Heatware under CrAsHnBuRnXp http://crashtown.myminicity.com/ind CrAsHnBuRnXP's For Sale Thread

Mar 3, 2011, 05:14 AM	#2
CyaN1de Join Date: Mar 2011 Posts: 6 (0.01/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	Check power switch connector on the mobo perhaps?

Mar 3, 2011, 05:21 AM	#3
Jack Doph Join Date: Jan 2011 Location: Upright down-under (Brisbane, Australia) Posts: 468 (0.55/day) Thanks: 835 Thanked 110 Times in 97 Posts System Specs	Did you clear the BIOS before turning the system off? Try a CMOS clear just in case. EDIT: additionally - did you make sure the CPU power connector is in place?

System Name:	H1200
Processor:	Intel i5 2500k @ 4.3GHz w/ Corsair H60
Motherboard:	Asus P8P67 (Rev 3.1)
Cooling:	1x200mm LED fan, 5x120mm LED fans
Memory:	G.skill DDR3 1600MHz 2x2GB @ 2133MHz
Video Card:	BFG nVIDIA GTX 285
Hard Disk:	Mushkin 120GB Chronos SSD, Seagate 750GB SATAII & WD 250GBx2 SATAII
Optical Drive:	LiteOn DVD-ROM, LG DVD-RW± DL SATA
CRT/LCD Model:	LG 24 inch Flatron
Case:	Antec Twelve Hundred Full Tower
Sound Card:	Creative X-Fi XtremeGamer / Plantronics Gamecom Headphones
PSU:	Corsair HX750w Professional Series
Software:	Windows 7 x64 Professional

Mar 3, 2011, 05:36 AM	#5
Kistel Join Date: Feb 2011 Location: California Posts: 57 (0.07/day) Thanks: 3 Thanked 1 Time in 1 Post System Specs	I double checked the system panel connector for power and reset, and found I had installed them incorrectly. Now the system starts, the fans power up but there is no POST.

Mar 3, 2011, 05:41 AM	#6
CyaN1de Join Date: Mar 2011 Posts: 6 (0.01/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	As stated clear CMOS. Remove any unnecessary equipment such as storage drives, optical drive etc. Use 1 RAM stick in first slot if using more than 1 stick at the moment. If still no post, try the 1 stick in each slot. If still no post, try another stick of RAM. (I had this problem recently with RAM not playing nice with the mobo).

Mar 3, 2011, 05:47 AM	#8
Jack Doph Join Date: Jan 2011 Location: Upright down-under (Brisbane, Australia) Posts: 468 (0.55/day) Thanks: 835 Thanked 110 Times in 97 Posts System Specs	No it won't wipe the BIOS update All it does is default the BIOS settings to factory default, but you will lose settings like time/date/CPU configuration etc. The BIOS will then default to a detect setting (if you like), so your hardware will run fine. There should be a battery on your mobo which you can remove, or alternatively, there's an "clr CMOS" jumper you can use to short it (about 5-10 seconds). Make sure power is OFF when you clear the CMOS!

Mar 3, 2011, 05:52 AM	#9
Kistel Join Date: Feb 2011 Location: California Posts: 57 (0.07/day) Thanks: 3 Thanked 1 Time in 1 Post System Specs	Ok, I removed all hard drives, video card, and one RAM. Still no POST. I will try my CMOS next. But if it is a CPU comparability issue or hardware issue regarding the CPU, would it POST?

Mar 3, 2011, 05:55 AM	#10
Jack Doph Join Date: Jan 2011 Location: Upright down-under (Brisbane, Australia) Posts: 468 (0.55/day) Thanks: 835 Thanked 110 Times in 97 Posts System Specs	Well, if for some reason the BIOS update didn't work, then your CPU cannot be recognised, so the system will not POST. However, if you're convinced the BIOS update was successful, then there should be no compatibility issue.. EDIT: you will need to clr CMOS before you can try POSTing without your graphics card

Mar 3, 2011, 06:09 AM	#14
Kistel Join Date: Feb 2011 Location: California Posts: 57 (0.07/day) Thanks: 3 Thanked 1 Time in 1 Post System Specs	I will try the old CPU next. For now, how do I remove my CMOS battery? My manual does not tell me what I must do to pull the battery out. Do I just physically pull it out?

Mar 3, 2011, 06:18 AM	#15
Jack Doph Join Date: Jan 2011 Location: Upright down-under (Brisbane, Australia) Posts: 468 (0.55/day) Thanks: 835 Thanked 110 Times in 97 Posts System Specs	It's better if you try the CMOS CLR jumper first. Should be close to the battery itself

Mar 3, 2011, 06:31 AM	#17
pantherx12 Eligible for custom title Join Date: Jan 2009 Location: ENGLAND-LAND-LAND Posts: 8,443 (5.26/day) Thanks: 1,188 Thanked 1,705 Times in 1,375 Posts System Specs	Anyone considered that this is a am2/am2+ board? It probably needs a bios upgrade if it supports 6 cores at all.

System Name:	Panther's PC
Processor:	FX8120 4.5 ghz + 0.125 volts over stock
Motherboard:	Gigabyte 990fxa ud3
Cooling:	Ek Supreme, Coolingking Tripple Thick Copper Radiator
Memory:	Hyperx 4x2gb 1600mhz
Video Card:	460 768mb : [
Hard Disk:	WD blue 500gb
CRT/LCD Model:	AOC HD
Case:	Mountain Mods U2-UFO
Sound Card:	Audigy z2
PSU:	Powercool 750w modular PSU ( GAMBLING YAY!)
Software:	Windows SEVEN
Benchmarks:	Pffft benchmarking for me is for the lulz only!

Mar 3, 2011, 06:32 AM	#19
Jack Doph Join Date: Jan 2011 Location: Upright down-under (Brisbane, Australia) Posts: 468 (0.55/day) Thanks: 835 Thanked 110 Times in 97 Posts System Specs	If there's a bent or broken pin, then you have no chance of the CPU working, that's correct.. Try the above suggestion of using your old CPU & see if it POSTs then

Mar 3, 2011, 06:50 AM	#24
CyaN1de Join Date: Mar 2011 Posts: 6 (0.01/day) Thanks: 0 Thanked 0 Times in 0 Posts System Specs	Don't you just love computers?

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