Hp Pavillion laptop freezes when I install secondary memory
I purchased 512 addit'l memory for the laptop and installed it in the slot on the bottom of the laptop. After that it would not boot, get to the post screen and stop, and ocasoinaly it would boot but freeze after about 3 minutes. If I boot to Diagnostic CD it would freeze but take a longer time to do so.
Removed the chip and left it out. booted and ran fine. Replaced origional 256 chip and sill freezes. Ran memory test and all passed. Memory is correct for the systemas well.
Finally I put the new 512 stick in the primary slot under the key board and it runs well. Again, I put one of the origional 256 in the secondary slot, again it started to freeze. switched chips with the other 256 chip and same result.
There are no Bios settings that can be changed; this board has a basic bios setup. cannot see it being a heat issue because it hapens when the systen first starts i the morning and when it is warmed up.
Ive done as much research on this problem but still fail to find any solutions.
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Make sure your battery is removed, unplug, reseat memory mods, make sure they are inserted fully. I assumed the 512MB are used? New? There is no reason , that I can come up with, they should not work? I have upgraded many memory mods without incident.
Pavilion ze4910us Memory SpecificationsStandard Memory
512 MB (removable)
PC2100/2700 DDR SDRAM SODIMMs
1.4GHz Intel Celeron M 330
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most hp/compaq laptops will have memory slots located under the keyboard, and sometimes an additional memory slot accessed through a panel on the bottom of the notebook. In your case, you have 2 memory slots located under the keyboard. Officially, this unit only supports up to 256 mb memory modules for a maximum of 512 MB of memory so if you already have that, be aware that larger capacity memory modules may not work.
Each memory slot on the C555NR can support a maximum of 1GB of RAM. There are actually 2 slots, but only one is easily accessible to you. By upgrading both the primary and secondary DIMMs, you could achieve a total of 2GB of memory but you would have to remove the 512mb chip that is already installed and replace it with 1GB (+1GB in the expansion slot as well.)
If you don't plan on taking the computer to a professional to be serviced, you will probably only want to upgrade the memory in the secondary slot located under the memory cover on the underside of the computer. It can handle a 1GB SODIMM.
FYI the memory is: 200 Pin DDR2-533 PC2-4200 SODIMM
This site will show you where to find the location of the memory.
The slots are below the keyboard to the rightr of the track pad. THe "Tabs" that hold the lid down can be seen if you look at the bottom left of the keyboard area. You need a flathead screwdriver size small to remove the lid.
Maximum HP/Compaq approved memory is 4 GBIt has to be the same.
• If you are replacing a memory module, put the
new memory module in the same memory slot
from which the old memory was removed.
• If you are adding a memory module, install the
new module into the socket nearest the
preinstalled module, and install additional
modules in the next available sockets