I've had an HP Pavillion ze4420us laptop for about 3 years. It came with 256 MB of memory, so I added a 512MB module to bring the total system up to 768MB. This worked fine until about a month ago.
I started having various errors, depending on which slot I had the 512MB module in it. Remove that module and leaving the 256MB module in and the system works fine (except slow, of course.) I sent the 512 MB memory back to Centron and had it replaced under their lifetime warranty policy.
I got the new memory today and I can't get it to work. When I have both modules in, it doesn't even recognize the 512MB module, but the system works fine. Going to BIOS won't let me change what the laptop thinks I have.
If I just have the new 512MB module in, the laptop keeps rebooting as soon as I power on (doesn't even show the initial press F2 for for setup screen.) This was one of the things that was happening originally before I sent the memory in for replacement.
Is it possible (likely?) that the new module is also bad? Or is it more likely that I've got some other kind of problem with my laptop?
Any help in trying to diagnose this would be greatly appreciated. While his laptop is far from current technology, I'd prefer to avoid having to drop $1,000 to replace it.
Thanks.
-Steve
I started having various errors, depending on which slot I had the 512MB module in it. Remove that module and leaving the 256MB module in and the system works fine (except slow, of course.) I sent the 512 MB memory back to Centron and had it replaced under their lifetime warranty policy.
I got the new memory today and I can't get it to work. When I have both modules in, it doesn't even recognize the 512MB module, but the system works fine. Going to BIOS won't let me change what the laptop thinks I have.
If I just have the new 512MB module in, the laptop keeps rebooting as soon as I power on (doesn't even show the initial press F2 for for setup screen.) This was one of the things that was happening originally before I sent the memory in for replacement.
Is it possible (likely?) that the new module is also bad? Or is it more likely that I've got some other kind of problem with my laptop?
Any help in trying to diagnose this would be greatly appreciated. While his laptop is far from current technology, I'd prefer to avoid having to drop $1,000 to replace it.
Thanks.
-Steve