CPU won't boot after memory upgrade

BobbyGT · 02-03-2007, 10:08 PM

I have a hp pavilion 7940 and i just upgraded up to 512mb of memory. It will no past the screen with options of how to boot (normal, last good config, etc). I have tried them all and none of them work. What do i need to do. I am running xp pro with sp2 and it worked fine until i upgraded the memory. any help will be gratly appreciated.

**manic** · 02-04-2007, 05:32 AM

Make sure ram is seated good and tight. You may try another slot.
You should check and see that the ram is compatible with that mobo.
Ram can be tricky to install, it requires more force then most people
expect to install.

BobbyGT · 02-04-2007, 10:11 AM

its in there good. it shows up in the bios. the cpu just will not boot up

**manic** · 02-04-2007, 01:04 PM

The system just hangs on the post screen? How do you know bios
sees the ram? Do you know how to clear cmos and reset settings in
bios? If so that is what I would do next. Make sure you didnt shake
something loose inside of case when you installed ram.

**speedster123** · 02-04-2007, 01:18 PM

Try Manic's suggestion and clear the cmos:
Switch off the power supply unit and pull off the power cord. There is a CMOS jumper near the battery. Change the jumper position from default 1-2 to 2-3 for one minute to discharge the CMOS data, check your motherboard for the correct pin numbers, and then put it back to default 1-2. Press the power-on button to boot up system. If it works, hit "Del" key to enter the BIOS setup page to do correct settings.
Or pull the battery out for 15 to 20 minutes after you unplug the machine de-static yourself before entering.

BobbyGT · 02-04-2007, 06:46 PM

Ok. I will give clearing cmos a try. I don't think I loosened or messed anything up while i was in there. Yes the cpu continues to come back to the 5 options ( i believe its 5) on how to continue no matter what choice is made. it just want boot up. i hit f1 and entered the bios screen and it is listed there. thanks for the suggestions

BobbyGT · 02-05-2007, 09:45 AM

clearing the cmos didn't work. so i'm gonna try and figure something else out

**speedster123** · 02-05-2007, 09:57 AM

Put the memory back to factory condition and see if it boots.

BobbyGT · 02-06-2007, 07:28 AM

I think i need to update my bios or something. I have already done that but it doesn't wanna boot with 512mb of memory. I 'm gonna try and go back to 128mb and see what happens.

02-03-2007, 10:08 PM	#1 (permalink)
BobbyGT Registered User Join Date: Jan 2006 Location: Tennessee Posts: 69 OS: xp pro sp2	CPU won't boot after memory upgrade I have a hp pavilion 7940 and i just upgraded up to 512mb of memory. It will no past the screen with options of how to boot (normal, last good config, etc). I have tried them all and none of them work. What do i need to do. I am running xp pro with sp2 and it worked fine until i upgraded the memory. any help will be gratly appreciated.

02-04-2007, 05:32 AM	#2 (permalink)
manic Mentor Hardware Team Join Date: Aug 2005 Location: Florida Posts: 2,994 OS: xp	Make sure ram is seated good and tight. You may try another slot. You should check and see that the ram is compatible with that mobo. Ram can be tricky to install, it requires more force then most people expect to install. __________________

02-04-2007, 01:04 PM	#4 (permalink)
manic Mentor Hardware Team Join Date: Aug 2005 Location: Florida Posts: 2,994 OS: xp	The system just hangs on the post screen? How do you know bios sees the ram? Do you know how to clear cmos and reset settings in bios? If so that is what I would do next. Make sure you didnt shake something loose inside of case when you installed ram. __________________

02-04-2007, 01:18 PM	#5 (permalink)
speedster123 Mentor Join Date: Oct 2006 Location: United States-New York Posts: 3,864 OS: xp pro My System	Try Manic's suggestion and clear the cmos: Switch off the power supply unit and pull off the power cord. There is a CMOS jumper near the battery. Change the jumper position from default 1-2 to 2-3 for one minute to discharge the CMOS data, check your motherboard for the correct pin numbers, and then put it back to default 1-2. Press the power-on button to boot up system. If it works, hit "Del" key to enter the BIOS setup page to do correct settings. Or pull the battery out for 15 to 20 minutes after you unplug the machine de-static yourself before entering. __________________ Infection Detection and Removal Thermal Grease Instructions Bench Test Last edited by speedster123 : 02-04-2007 at 01:19 PM.

02-05-2007, 09:57 AM	#8 (permalink)
speedster123 Mentor Join Date: Oct 2006 Location: United States-New York Posts: 3,864 OS: xp pro My System	Put the memory back to factory condition and see if it boots. __________________ Infection Detection and Removal Thermal Grease Instructions Bench Test

02-04-2007, 10:11 AM	#3 (permalink)
BobbyGT Registered User Join Date: Jan 2006 Location: Tennessee Posts: 69 OS: xp pro sp2	its in there good. it shows up in the bios. the cpu just will not boot up

02-04-2007, 06:46 PM	#6 (permalink)
BobbyGT Registered User Join Date: Jan 2006 Location: Tennessee Posts: 69 OS: xp pro sp2	Ok. I will give clearing cmos a try. I don't think I loosened or messed anything up while i was in there. Yes the cpu continues to come back to the 5 options ( i believe its 5) on how to continue no matter what choice is made. it just want boot up. i hit f1 and entered the bios screen and it is listed there. thanks for the suggestions

02-05-2007, 09:45 AM	#7 (permalink)
BobbyGT Registered User Join Date: Jan 2006 Location: Tennessee Posts: 69 OS: xp pro sp2	clearing the cmos didn't work. so i'm gonna try and figure something else out

02-06-2007, 07:28 AM	#9 (permalink)
BobbyGT Registered User Join Date: Jan 2006 Location: Tennessee Posts: 69 OS: xp pro sp2	I think i need to update my bios or something. I have already done that but it doesn't wanna boot with 512mb of memory. I 'm gonna try and go back to 128mb and see what happens.