Failure in Flashing the BIOS of Compaq Presario CQ40-109TU

[reimier]

Good day to all.

I am upgrading my Compaq laptop from its default Windows Vista Home Basic to Windows 7 Ultimate 32-Bit. My laptop model is CQ40-109TU.

I freshly install the Windows 7 and download all the recommended drivers and softwares from HP/Compaq site for my laptop model with Windows 7 32-Bit.

After finishing the installation of Windows 7, Avira Antivirus and Windows Updates, my laptop starts up successfully. But after I install the recommended BIOS version F.55 A (sp45765.exe), my laptop hangs at start up when Compaq logo is displayed, and it does not respond in any keys I press (like Esc, F8, F12, etc.) to view the BIOS configuration. It only beeps after pressing a key several times.

Also, I notice that my laptop does not charging too after the laptop restart. The LED on AC adapter has light, but the light where the adapter connects to my laptop is off. But there is a blinking light in the thunder icon while the charger is connected to my laptop. So, the charger is okay and supplies electricity to my laptop. But why the light, that indicates the laptop is charging, is off? Currently, the battery is drained already.

My laptop's previous and working version of BIOS is F.12, and I have no backup for that.

I run the BIOS setup (sp45765.exe) just by clicking the file in Windows-mode not in DOS-mode, just what was said in the directions. I think, power interruption is not the cause of the problem because the charger or AC adapter is properly connected and the battery is fully charged during the upgrade.

What happen to my laptop? Do I miss something during my installation process, or the BIOS version F.55 A does not really compatible to my laptop? Is there any workaround for this problem? How can I restore my previous BIOS version F.12?

I am very hopeless, and I don't know what to do. Please help me.

[MasterUMC]

Resetting CMOS configuration may resolve this, only problem is it will have to be done by removing the internal CMOS battery since you cannot get into the BIOS setup. Also, the battery may be soldered to the motherboard. Maybe a local shop can give it a try of they don't charge you much for the process.

That is if it's not under warranty. If it is under warranty, call HP.

[bozsniguapa]

Hi! try to press 4 arrow keys after you switch on your laptop...and when display start up press F5 or F6... have a nice day, Good luck... If not try to text me, [Personal Information Removed]