In a Acer aspire M5640 has an on board video /intergrated in to the motherboard. When I boot up the computer, the montor is blank, I have tried the montor on a different computer, and it works on the other computer. I have tried to install a new viedo card, I am not able to switch from the intergrated viedo, to the new viedo card, without going to windows Vista home Premium. What can I do? Big mo63

Have you reseated/replaced the Memory Mods? Reseat the HDD? Remove the HDD and test?

http://www.manualslib.com/products/Acer-Aspire-M5640-1736069.html

Make sure you have securely connected both the four pin and 24 pin motherboard power connectors into the motherboard. If either one of these are even partially unplugged it can cause your system to freeze. Also, since you have been working inside the computer, try pushing the RAM in, just in case it came loose. If you are still encountering problems check all the rest of the power and data connections inside your computer including hard drives and the new video card.

I assume you are using the integrated video, (on board). With a new power supply and motherboard you have eliminated all but the monitor. Try a different monitor. I have also seen a case where a computer tower worked fine in one setup with a flat screen, but when hooked up to an older CRT monitor it would not display because of the resolution settings.

If you have no 'BIOS' startup display, try:

• Unplug the PC from the main AC power to force a hard reset. Reboot and test.
• cleaning the memory board 'gold' contact with a white soft pencil eraser and swap them around if you have a couple. Reboot and test.
• using a single memory board if you have more than one. Reboot and test for each memory board individually.

If you have 'BIOS' startup display, but fail to boot, also try:

• Check and re-seat all external and internal cables (HDD, USB), and PCI cards (eg. Video)
• Check Bios setting expecially for HDD

Hope it helps and good luck!

Remove the CMOS battery and remove hard disk connection from the motherboard. Then restart ur system. It will give u the msg no boot device found. Now reinsert the CMOS and hard disk connection.

You can disable onboard video controler from BIOS.

check the resolution.
start up through safe mode(F8 key before boot-up), and reduce the resolution.

yeap..
look for pci express graphics card (dedicated)..
better to have 'sli cross-firing'..

seek supervision of ur system admin/vendor....

If your computer no boot, respond to a motherboard failure, (video, memory, hard drive) - Try to boot with a boot CD and see what happen.