RAM memory expand modules

Did you remove and replace 1 or 2 RAM modules? There are 2 modules installed. One is internal and one is external. Both MUST BE OF THE SAME DENSITY OR THE LAPTOP WILL NOT WORK. You will need a second 1GB RAM Module, then use the link below to download the service manual for your laptop. Accessing the internal RAM module is fairly easy...follow the directions and you will have not problems. You CAN remove the internal one and operate the device on the single 1GB module, but I would recommend if you do that, you put the 1GB module in the internal slot. Then later, if you wish, you can add more RAM without additional disassembly. By doing this you will at least double your RAM from the 512MB you had to !GB. You can double it again with the second RAM Module to 2GB later.

.GO Here. Find Remove/Replace procedure for Internal Memory Module.

Hi - according to memory suppliers your T23 has the following memory capacity / requirements:

• IBM ThinkPad T23 maximum RAM capacity: 1GB
• Your IBM has Two (2) memory slots or sockets
• Module upgrade PIN count is: 144-PIN
• The memory speed is: SDRAM 133MHz, PC133
• The laptop DIMM type for the ThinkPad T23 is: SODIMM, SO-DIMM, Small Outline DIMM
• Non ECC

If you are meeting these requirements, you may have a defective module.

Also, according to Lenovo's page on the machine:

Memory
The system has 128MB or 256MB of memory standard and can be configured for up to 1GB of addressable memory. Memory options up to 512MB SDRAM SO DIMMs each can be added in the two available slots for memory expansion. The standard 128MB of memory is expandable up to 640MB and the 256MB of memory is expandable up to 768 MB of addressable memory with 64, 128, 256, or 512MB SO DIMMs without removing the 128MB SO DIMM that is standard in one of the internal slots for memory. For customers that need the maximum 1GB to which memory can be expanded, it is necessary to replace the 128MB or 256MB card with a 512MB card plus add another 512MB card in the extra slot. Only 133MHz DIMM memory can be used in this system. The use of 100MHz DIMM memory is not supported in the T23 systems.

This means yo can trouble shoot the 512MB modules individually by installing one of the original 128MB modules and one of the new 512MB modules (for a total system memory of 640MB). If it does not boot, try again with the other 512MB module. This will help you identify a defective module that may be preventing the machine from booting.

I hope this helps & good luck!

Memory Type: DDR2 PC2-5300, DDR2 (non-ECC)
Maximum Memory: 4GB
Slots: 4
Each memory slot can hold DDR2 PC2-5300 with a maximum of 1GB per slot.*
*Not to exceed manufacturer supported memory.
Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.When using PC2-5300 parts the maximum memory is 2GB. When using PC2-4200 the maximum is 4GB.

The Samsung N150 Laptop comes installed with 1GB of Memory and can be upgraded to a maximum of 2GB Memory. This computer has 1 (one) SO-DIMM memory slot, so to upgrade to 2GB of RAM, you will need to replace the installed RAM module with a single 2GB PC2-5300 DDR2-667 200pin SDRAM SO-DIMM memory module.

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Sony VAIO VGN-FS 760/W supports PC-3200 400MHz and PC2-4200 533MHz DDR2 RAM
Expandable up to 2GB. Please make sure that both RAM Chips are according to the above specification, compatible with yout system and both sticks are the same (make & bus speed). Try using one RAM at a time and swaping RAM slots to see if the amount of memory is shown correctly. Memory is not recognized only when it is not up to the specifiction. If the RAM sticks are ok, the system shoud recognize them.

Let me know if any further clarification/ assistance is required.
Good Luck!
Hope this helps!
CreativeTECH

I have checked the Compaq Presario CQ60-215DX Specification It Originally has 2GB Memory and supports upto 4GB RAM max. If you intend to upgrade the RAM, you can buy additional RAM and put them in you system. Here is the HP Guide to Replace RAM and How to Upgrade RAM Guide
Compaq Presario CQ60-215DX has two RAM slots for DDR-2 (533 or 667) Memory Modules. First you have to check that the RAM slot is available for additional RAM. I believe that it has two modules of 1GB each in both slots. So, you have to get two modules of RAM 2GB each to upgrade to 4GB (or one 2GB RAM module to upgrade to 3GB). Hence, it is recommended that you get 2GB replacement module for each 1GB module you have on you system from local laptop repair/ service center, which would be cost effective as existing 1GB RAM Modules would be useless for you upon upgrade.

Let me know if any further clarification/ assistance is required.

Good Luck!
Appreciate generously, if the solution could have been of any help!
CreativeTECH

I cant tell u the max RAM but u can use 1Gb without any problem.

try each ram one by one. if there is prob in ram it will show only 512 instead of 1 GB.. Second check for memory shared in bios

1) mismatch of clock speed for motherboard
2) memory not seated properly, remove, blow away dust from socket and reseat.
3)motherboard does not support 1gb of memory without bios update.
4) memory module no good, return for replacement

RAM has to be

Four 184-pin DDR DIMM sockets

Supports PC3200 (400 MHz) /PC2700 (333 MHz) / PC2100 (266 MHz) DDR DIMM type

Maximum HP/Compaq approved memory module is 1 GB

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.
Or
• 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