How to do jumper setting on RAM upgrade from 2 x 256 MB to 2 x 512 MB.

The best and quickest improvement is to add more RAM. Add another 512 Mb of RAM. If you already have a 512 Mb of RAM module then add another 512 Mb RAM module. If your laptop has 2X256 Mb RAM modules then you need to remove these and insert 2X512 Mb RAM modules.
The reason why you have 504 Mb RAM is that the video card has grabbed 8Mb of RAM off the main memory.

The original 2 sticks of 256 Mb of RAM gives you a total of 512
Mb of RAM. Two 512 Mb of RAM gives you a total of 1 Gb of RAM.
With two sticks of 512 Mb of RAM are you sure you got a total of 192 Mb of RAM, this is a lot less than the original RAM total of 512 Mb?
Should this be 1920 Mb of RAM?
If this 192 Mb is correct then the RAM modules are either not compatible with the laptop or if the RAM modules are not from the same manufacturer then they may not work together.

Most laptops have video cards that use part of the main RAM for video RAM, that is why the available RAM is less than the installed RAM modules. The amount of RAM the video card grabs depends upon the type of video card and in some cases the amount of video RAM can controlled in the BIOS setting.

first you check that your ram version.... i means it is compatible with your motherboard...if still prob remains then remove your all ram insert 128 mb ram then restart the system....... upgrade ram should fallow frequency of 512 mb RAM are same as 128 mb ram freqency........if mismatch is occured then it did nt wrked correctly...

frquance is not set and it is not recommand that 2 different friquance ram is not working propaties

Hello,
Most likely your MB is too old for this upgrade although there is a chance you could flash your bios (reprogram your computer's brain to accept the new memory providing hp has a flash for it).
here is a link for the latest bios flash for your computer, use at your own risk.
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=12454&prodSeriesId=32895&swItem=vc3903en&prodNameId=20305&swEnvOID=54&swLang=13&taskId=135&mode=4&idx=0
good luck.
Thank you,
agadycom

hi dear
there is always speed mismatch problem occur when we use low processor & high ram

so try to use 256 ram
also try to use 1 slot of 256 ram & 2 slots of 128 ram diffrently
& compare the speed
hope it will help to u

Does the motherboard support 1 gig ram modules? what kkind of motherboard/video card do you have? sometimes video card onboard ram can ofset motherboard ram, especially with ati video cards.

The first thing i would suggest it so make sure you have the latest Flash Bios installed on your motherboard.

Just for giggles you could try to reverse the dimms just to make sure one of them isnt bad.

Another thing to try is to take a qtip with alcohol, unplug the computer and attempt to clean the contacts that house the dimm. If it has been in use for years there may be dust buildup.

The system uses shared video memory, so it will always show less memory than actually installed.
It's a good machine, but needs all memory it can get for Vista.
Good luck

It is OK to mix chip (SODIMM) capacities in the 2 slots in your notebook.

The best system performance will be when you have 2 x 512MB but for now if you install 1 x 512MB, you could even leave the old chip in the other slot, it'll be fine.