HELP NEEDED!! TOSHIBA P100 new ram problem

Hello,

I bought a new ram for my laptop and when I install them as dual the laptop just don't start the windows and keep giving me black screen, and when I try to enter the setup screen it works and it shows me that the ram is recognized!!

my laptop is TOSHIBA P100-222

the ram I bought are 2 slots of (Kingston 2GB DDR2-667 2 GB G SODIMM Laptop SDRam) that its total of 4GB

my laptop support up to 4GB ram so I don't think that this is the problem, it was running 1GB ram as (2 x 512MB) dual but when I install it as (2 x 2GB) it doesn't start the windows !!!

now its running as 2.5GB as ( 512MB + 2GB ) and I tried both of the new rams as alone on it and it dose start so the ram slots work as singles but looks they don't love each others

any ideas about what is the problem here

thanks in advance

 

what os???

vista 32bit? i pressume.......

 

Ironic the matched sticks won't play nice. I really don't have any clue. I do observe when paired with PC4200/4300 it works? Maybe having trouble down clocking? It is supposed to take 4GB like you said and BIOS sees. If XP isn't there a patch to run 4GB or am I mistaken?

 

yes, def a patch from ms for those having this problem. I first enconuterd it trying to install an os after the upgrade and kept crashing.....

http://support.microsoft.com/kb/929777/en-us

hope this helps, missed it first time, sorry

 

its windows XP but the OS is not the problem coz i even tried to boot from windows XP CD or windwos vista CD and it gives me the same black screen... and dont start

 

it just dont boot from any OS or booting method :S

 

I would not expect it to work off disc if what I am thinking. Disc is still XP so same OS same problem. I will check at lunch.

nobscot6 link goes Vista can you find XP, I'm at work so can't right now?

 

i dont understand !! even if i tired to boot from windows vista CD ?? coz i did and its the same...
i believe that its a problem in the BIOS but am not sure and i dont know how to fix it, coz the setup screen of the laptop is limitied as you know :S i cant edit anything from here, i cant do things such overclocking !!

correct me if i am wrong

thanx

 

I am wrong scanned to fast and missed you have both correct? Dual boot Vista and XP?

 

no not like this!
i have windows XP installed on the laptop it dont boot
i tried using windows XP CD to boot from still dont work
i tried using windows Vista CD to boot from still dont work
but i only have windows XP installed on the laptop and no other systems

 

Have you tried starting in safe mode, there is something call PAE and something you set in the boot ini. But safe mode should avoid this so if it starts see how much RAM is recognized. There is much on XP and 3GB RAM and a thing called a "3GB switch" I do not now if this is your problem. It seems like the usual problem is failure to recognize not failure to boot. Like I said at work happy to read up tonight if no one who knows what's wrong posts. If it starts in safe mode likely not RAM or BIOS back to OS. If it does not start likely different problem. I suspect OS because you you say RAM shows up in setup screen? Well that indicates hardware (RAM) and BIOS working. Google "XP 3GB" switch if you want to consider on your own.

 

okay guys the problem is solved i found that i need to flash the BOIS to the new 4.2 version i thought i was having the last one nd i didnt check if there was a new one
coz i installed 4.1 long time ago b4 buying the ram

now it works i just need to install a new OS to be able 2 read the 4GB not just 3GB ^^

thx POWERBACK u wasnt having the time to scane 4 it but u showed me from where to start ;]

 

Sorry to drag up a thread that's headed towards a year old.

I have a similar problem with my machine. I updated the bios to the newest one available, but it only recognizes 3 of the 4gb I have installed (2x2gb).

Anyone have any further suggestions?