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Full Version: [REQUEST] HP Compaq Presario CQ56 CPU Upgrade
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It is my first post here. So I post because I need you help : in fact, I wanna do an upgrade of my laptop (Compaq CQ56-293sf, Celeron M 925) with an Intel Core 2 Duo P8800. When I put the new CPU in my laptop, no boot, black screen with Caps del flashing.
I flashed my BIOS with the last stock version proposed (this one, the F.15 Insyde version) by HP but it isn't enough, same problem.

I think my problem is due to the brided BIOS from HP, I think a modded BIOS can solve my problem, so what do you think ?

Best regards.

NB : sorry, english isn't my native language.
Post screenshots of first (CPU) & third (Mainboard) tabs of CPU-Z.
Thank you for your answer.

Here are the screens waited :

First tab (CPU) : [Image: mini_161870tabcpu.png]

Third tab (Mainboard) : [Image: mini_123350tabmtherboard.png]

Best regards.
Your motherboard is based on GL40 chipset. It supports FSB=667Mhz and FSB=800Mhz(unofficially), dut doesn't support FSB=1066Mhz. So you can't use P8800 in your laptop.
The best CPU for your laptop is T9500 or T9300.
Oh my, I read on the net it could be work with differents FSB, so it wasn't true Sad

Are you sure for the T9300 ? I will buy ebay one of them if you are sure.

Thank you for your help.

Best regards.

Edit : I will ask a stupid thing, but isn't it possible to overclock the FSB of the chipset ?
You can try to boot P8800 with BSEL mod and run it on 2 Ghz only with a performance of T8100. Forget about overclocking GL40.
Make BIOS backup by Universal BIOS Backup ToolKit 2.0 and I'll check CPU support.
Update:Your BIOS has microcode for CPUID=10676, version - 60F, date - 09/29/2010. So it supports T9500 and T9300.
OK, but I can't find the necessary photos/diagrams for the BSEL mod (too old topics).

I found an old laptop into my GF house, and the CPU must be able : T6670. So I will try it this week-end.
Isn't the best like T9300 or T9500, but it could be a free upgrade Big Grin

Too bad for my P8800, I will try to sell it !

Thank you very much for your help.
Hello,i would like to upgrade my G56-110SL from a T4500 to a T9600 or T9800 or T8300,but since the Bios has a CPU Whitelist,this upgrade is not possible with a stock bios,is there a way to include one of those processors in the whitelist?Would also be awesome if the wifi cards whitelist could be removed!

Stock Bios:

I'm also attaching some screenshot from CPU-Z

[Image: wjc6nX5.png]

Hope someone can help!Thanks everyone!
Chipset GL40 doesn't support FSB=1066Mhz. So you can't use T9600 & T9800.
T8100, T8300, T9300 and T9500 are recommended for upgrade.
Whitelist for wifi cards is offtopic here.
Oh ok I'm sorry,didn't knew that...i think i'll go with the t9300 then,if anyone is kindly willing to help me
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