Keyboard inputs not recognized, can't get into BIOS

January 15, 2018 at 14:24:33
Specs: Windows 10
Have CMOS Checksum Bad error but nothing happens when I hit F1 or F2 or any key for that matter. Motherboard has only USB ports for keyboard/mouse and I don't have a PS/2 keyboard anyway. I have replaced CMOS battery 3 times and still get same error message at boot screen. I have also tried to clear the CMOS by moving pin jumper to 1 and 2 position for 5 seconds and then putting jumper back on pins 2 and 3. I have also tried every single USB port on back of computer to no avail. Only beeps I get when booting computer is the 5 beeps = Real Time Clock Failure.


Alienware Aurora R1, purchased in Feb 2010


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#1
January 15, 2018 at 15:31:30
Before changing the CMOS battery, unplug the power cord, press & hold the power button for about 20 seconds, then swap out the battery.

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#2
January 15, 2018 at 20:39:14
Try another USB keyboard, the simpler the better, no wireless, no built in hub, etc.
PS2 keyboards are not expensive and you may be able to get a good used one really cheap.

You have to be a little bit crazy to keep you from going insane.


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#3
January 16, 2018 at 08:53:41
There is no PS/2 port on the motherboard and the USB keyboard I'm using works on my other computer, so the keyboard is not the problem, something is inhibiting input from the keyboard. It was suggested that there might be a quick boot feature with the BIOS disabling the uUSB ports until the OS boots. Stated to turn off the computer, restart and hold down the power button until you get beeps, then a screen should come up asking if you want to use that feature or not. I tried that and it didn't work. Holding down the power button just shut down the computer. When the computer boots the following shows up on the screen:

Dell Aurora : A04 (10/28/2009)
Intel (R) Core (TM) i7 CPU 920 @ 2.67GHZ, Speed: 133x20=2660MHz

F12 to enter Boot Menu
The MCH is operating with DDR3-1066MHz
Initializing USB Controllers .. Done.
4088MB OK
USB Device(s): 1 keyboard, 1 Hub
Auto-Detecting AHCI Port 5..ATAPI CDROM
SATA Port6 PLDS DVD+/-RW DH-24AAS BD13
Auto-detecting USB Mass Storage Devices
00 USB mass storage devices found and configured.

CMOS Checksum Bad
Press F2 to Run SETUP
Press F1 to load default values and continue

I don't have the 2nd video card installed and the hard drive is disconnected. I've tested the PSU and that appears to be in good working order. I did replace the memory sticks with (3) 2Gb sticks, the old ones were 1Gb. I'm just at a loss as to why I'm still getting the CMOS Checksum Bad after I have replaced the battery 3 times and I did disconnect the power cord before doing so and left the battery out for about 30 mins and also cleared the CMOS with the pins and jumper, even cleared the password pins with jumper. When I first turn on the computer I get two beeps but not the same sound as the beeps you get when the computer is posting and there is an error like 2 beeps for No RAM detected. I assumed it just meant the computer is powering on.


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Related Solutions

#4
January 16, 2018 at 20:42:36
Clearing CMOS would remove the fast boot option.
What happens when you try the F2 to run Set Up?
Old or new RAM, clean the contacts with a soft clean pencil eraser, remove dust and pop them in and out of their sockets 5 or 6 times to burnish the sockets also. Then try the system to run Set Up (F2) again.
Try booting to a Live Linux disk to see if the hardware is generally working and if you have any problem there.

You have to be a little bit crazy to keep you from going insane.


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#5
January 17, 2018 at 00:48:55
The keyboard is detected. If you remove the Hub, still the same problem?

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#6
January 17, 2018 at 20:11:15
The keyboard is detected but input from keyboard is disabled. When you hit F1, F2, F12, etc. nothing happens, so something is preventing keyboard input. I've talked to Alienware support and everyone seems to agree that they think it's the motherboard. They also advised there is no Fast boot option on the computer. Guess I just need to buy a new motherboard and hope that solves the problem, if not, then maybe it's time to put my baby to rest for good and get a new one.

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