HomeIn this guide I’ll explain how to remove the keyboard and replace the internal memory module in a HP Compaq nc6400 series laptop.
HP Compaq nc6400 laptop has two memory slots. One of them could be easily accessed from the bottom but the second one is hidden under the keyboard. In order to replace the memory module in the internal slot you’ll have to remove the keyboard.
First of all, turn off the laptop, unplug it from the power adapter and remove the battery.
There are three screws securing the keyboard on the bottom. You can remove these screws with a #8 torx or flathead screwdriver. Remove all three screws.
There are four small latches located in the top row of keys on the keyboard. Unlock all four latches by moving them down with your fingernail.
Now you can lift up the keyboard as it shown on the picture below. Be careful, the keyboard is still attached to the motherboard.
It is possible to remove and replace the memory module in the internal slot WITHOUT disconnecting the keyboard. Carefully slide the keyboard aside and access the memory slot. I show how to disconnect and remove the keyboard only for readers replacing the keyboard.
Place the keyboard upside down on the palm rest. The keyboard is attached to the motherboard via two flat ribbon cables.
You’ll have to unlock both connectors in order to release the cables.
Each connector has a locking tab (one is white and another one is brown) witch has to be moved about 1-2 millimeters up.
Very carefully move both locking tabs up with your fingernails. Release both cables and pull them from the connectors.
Now you can remove the keyboard and replace it with a new keyboard if needed.
On the picture below you can see the hidden memory slot.
Carefully push on two latches pointed with red arrows until the memory module pops up at a 30 degree angle. Pull the memory module from the slot by the edges.
HP Compaq nc6400 laptop is upgradable to 4GB maximum. You can install up to 2GB RAM module into each slot.
Use DDR2 PC2-5300 667MHz SODIMM memory modules.
March 28th, 2013 at 3:41 pm
HP Compaq 8710w Mobile Workstation I put another adapter and there is no ignition have the opportunity to tell a burn any part or otherwise has not done smoke no noise became
January 12th, 2013 at 7:47 pm
Thanks for the pointers. They are helpful. Cheers!
January 7th, 2013 at 2:46 pm
@ tim,
Check out the official service manual for HP Compaq nc6400 notebook. The manual has step by step disassembly instructions.
January 7th, 2013 at 6:28 am
Can anyone tell me how to replace the motherboard on this unit
October 20th, 2012 at 7:40 am
I have same machine working on IGB ram.I have purchased 2gb memory stick.I cannot get the computer to boot and the graphiocs arent clear with lines on a reduced screen .what can I do?
November 26th, 2011 at 2:50 am
dear,
laptop tech
1. iam having this machine hp nc6400, can i use my PCMCIA OPTCL broadband in pakistan please guide me in this reagard.
2. how can I replace his battery and also how can I use its SC SLOT located right side of the machine.
November 24th, 2011 at 9:00 am
This particular laptop will not support DDR3 Ram (4GB Module). You will need 2 2GB DDR2 modules to obtain 4GB
November 20th, 2011 at 9:59 pm
@ Arpad,
I doubt that this laptop can support 4GB RAM module in one slot.
I think your only option would be installing two 2GB RAM modules.
512 MB + 4 GB probably will not work at all. Laptop might start properly but will not see all memory.
4 GB probably will not work at all.
2 GB + 2 GB I think the only option.
November 20th, 2011 at 12:41 pm
Dear Laptop Tech,
Currently I have 2 * 512 MB RAM. I will upgrade to 4 GB.
What would be the difference between the following options?
512 MB + 4 GB – in this case I wouldn’t have to take apart the laptop; I would have to change only the easily accessible panel
4 GB – I would take out both modules and insert only 1 piece of 4 GB module
2 GB + 2 GB
Any of the above would do? Would the end result be the same?
Thanks,
Arpad
October 1st, 2011 at 2:30 pm
hi
how can proceed to put back ribbon connector for Fujitsu LifeBook S7020 keyboard? it’s driving me crazy!!
thanks in advance