Boot message CMOS wrong AND keyboard locked

Pcchips / M758lmre
February 19, 2010 at 21:39:11
Specs: windows XP pro, 1.8Mhz/512ram
when booting my pc i get a message cmos wrong and below it keyboard locked press f1 or f2 etc , but the keys on the keyboard dont work i ve tried a keyboard with usb conector and doesnt work either, the lights on the keyboards dont lit as usual,both keyboards work fine in other computer,i ve unhooked drives an else running just the ram the keyboard and mouse and dont seem to get passed that screen any more help or advice is apreciatte it

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#1
February 19, 2010 at 22:07:33
If the keyboard does not work at all then you cannot make any BIOS changes to enable legacy USB support that would allow a USB keyboard to work at boot.

Since you say you are getting a CMOS error at startup as well the only thing you can do at this stage is to reset the CMOS.

Disconnect mains power. Move CMOS reset jumper to the reset position. Press start button. ( Nothing should happen )

Return the jumper to the run position, reconnect mains power and try to startup. If you continue to experience CMOS errors and the keyboard still doesn't work then your motherboard is probably toast.

If you cannot identify the CMOS reset jumper then you can achieve a reset by removing the CMOS battery for 30sec ( While mains power is disconnected)

Goin' Fishin' (Some day)


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#2
February 19, 2010 at 23:41:29
Many motherboards still have jumper pins for a 'keyboard lock'. It was originally designed to attach to a keyed switch on the front panel. That way you could lock out the keybaord so no one would mess with your computer.

Anyway, if you have an old case with that feature or someone has been inside the case and jumpered those 2 pins, then that's the reason.

Edit Check my # 2 here:

http://www.computing.net/answers/ha...

You're not really green until you're soylent green.


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#3
February 20, 2010 at 10:20:21
sorry i should had mentioned that too i have reseted the bios by means of changing the jumper to the other pins and no this cabinet doesnt have an external lock on the cabinet so i guess the board is toasted right?...

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Related Solutions

#4
February 20, 2010 at 11:45:34
i checked the owners manual for the mb and two of the twentyone pins set for like power switch ,case speaker,reset botton,etc are labeled keylock pins 8 n 10 do i put a jumper on them before starting the machine?do i jump them while the machine is on?i was messing with those pins to find out which ones where which before discovering the manual on the net jeje,hope i can get this mb back to work

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#5
February 20, 2010 at 11:56:55
"...i ve tried a keyboard with usb conector and doesnt work either..."

See Response 1 in this:
http://www.computing.net/answers/ha...

It's common for corded cables to get damaged such that one or more wires inside the broken are broken, often right near where it enters the keyboard or mouse. If the keyboard or mouse works fine with another computer, there's nothing wrong with it, but if it doesn't work with another computer, try another keyboard or mouse.
A USB only keyboard requires that the bios Setup has the setting Legacy USB devices or USB keyboard or similar enabled in Setup, in order for you to be able to get into Setup, but it should wirk fine otherwise, if the USB controller(s) is(are) enabled in the bios Setup (it is / they are by default).

"Many motherboards still have jumper pins for a 'keyboard lock'. It was originally designed to attach to a keyed switch on the front panel. "

The circuitry for that is usually, if not always, designed such that if you do not connect a switch to the two pins on the mboard for it, the keyboard is always enabled.

Whether or not your mboard has the pins for that is shown in the mboard manual.

"Product: Pcchips / M758lmre"

That's a relatively old mboard.

Some mboards of that era had improperly made electrolytic capacitors installed on them that eventually fail as time goes by.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
http://members.datafast.net.au/~dft...

What to look for, mboard symptoms, example pictures:
http://www.badcaps.net/pages.php?vid=5
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
http://www.badcaps.net/

Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:
http://www.halfdone.com/Personal/Jo...


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#6
February 20, 2010 at 12:10:35
no blowned or overheated capacitors or transistors on this mb i ve also changed procesors and still have same message unlock keyboard i thin i locked when i was trying to jump pins to find out which were which just dont know now if the ones i mentioned in the previous post get umped before or when the pc is on

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#7
February 20, 2010 at 12:53:47
"i checked the owners manual for the mb and two of the twentyone pins set for like power switch ,case speaker,reset botton,etc are labeled keylock pins 8 n 10 do i put a jumper on them before starting the machine?"

If the mboard manual says nothing about installing a jumper on the pins for it if you're not connecting a switch to it, then this applies:

The circuitry for that is designed such that if you do not connect a switch to the two pins on the mboard for it, the keyboard is always enabled.

I have a lot of PCChips mboard manuals on my computer, and it seems none of the ones I've looked at require a jumper on those pins if you don't have a switch connected to them.
.........

"....i get a message cmos wrong..."

What exact message are you getting ?

If it's something other than or in addition to
"Cmos Checksum Error...." or similar............

e.g. if you see BOOT BLOCK BIOS....... or similar

then someone has flashed the bios with the wrong bios update, or something went wrong while flashing the bios.
When you flash the bios, usually by default the boot block bios part of the bios code is NOT flashed.
The keyboard cannot work if you see that, because the boot block part of the bios code has only enough code in it to enable your floppy drive to work.

That can usually be recovered from by using a special procedure and a floppy disk that has one of the right bios updates and the right flash utility it is supposed to be used with on it.
The procedure you use depends whether your bios overall version is AMI or Award - on most older PCChips mboards, it's an AMI bios.



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#8
February 20, 2010 at 13:01:18
this is what screen reads...
Intel(R)Celeron(TM) CPU - 1.0 Ghz
Checking NVRAM
262144KB OK
WAIT.....
CMOS Settings Wrong
Unlock Keyboard
Press F1 tu Run SETUP
Press F2 to load default values and continue_

...again none of the keys work on any of the keyboards i have used nore the lights on the keyboards flash as usual on the neyboard any more help is apreciatte it


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#9
February 20, 2010 at 13:18:22
"i should had mentioned that too i have reseted the bios by means of changing the jumper to the other pins "

Did you move the jumper back to the "normal" position ?
You MUST !
Don't rely on labelling on the mboard near the pins because that can be confusing - check the manual.

Did you flash the bios just before this first started to happen?
If so, if you used the wrong bios update, or something went wrong while flashing the bios, the main part of the bios code is probably corrupted. The problem doesn't appear until you have re-booted the next time after you flashed the bios.

You could try flashing the bios by means of booting with a bootable floppy with the right files on it and a suitable line in autoexec.bat for flashing, IF you can still boot from a floppy disk.


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#10
February 20, 2010 at 13:33:34
You have an AMI bios version.
The errors messages you can get:
http://www.ami.com/support/doc/AMIB...

Unlock Keyboard
PS/2 keyboard is locked. User needs to unlock the keyboard to continue BIOS POST.

Take a look in your manual and make sure you have NOT connected anything by mistake to the pins for the keyboard switch. Don't rely on labelling on the mboard near the pins because that can be confusing - check the manual.

Take a look at your PS/2 keyboard - in theory it could have a manual switch on it, perhaps on the bottom, that locks the keyboard (I've never seen such).


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#11
February 20, 2010 at 14:23:46
its the manual i am looking at for the pins setup and for 8-10 pins it reads KEYLOCK i have put a jumper and started the machine and unlock keyboard message still comes on i also jumped them when the machine was on and nothing happenes,no i havent flashed the bios, dont have a real clue how, all i was doing was putting this pc back togheter after cleaning the paste in the procesor cause machine wouldnt start anymore,so i tried different combinations of jumping pins to get it started and when i finally got it back to start again that message of unlock keyboard came on t/y for interest int this and all help

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#12
February 20, 2010 at 16:01:14
Yeah, no jumper would be 'keyboard enabled'. Look for a fuse as I mentioned in the link in my # 2. If you find it you probably won't be able to tell if it's blown unless you put an ohmmeter to it.

You're not really green until you're soylent green.


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#13
February 20, 2010 at 18:54:45
"....putting this pc back togheter after cleaning the paste in the procesor cause machine wouldnt start anymore..."

It should have been obvious the cpu was overheating if your problem was there.
E.g. the mboard would have shut down automatically, and you may have heard warning beeps not long before it did.
Usually that isn't the problem.

"....so i tried different combinations of jumping pins to get it started...."

Huh?
What did you do? Doing that may have fried something !


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#14
February 20, 2010 at 22:28:18
I checked the error message for AMI bioses ''unlock keyboard'' and all it says is this PS2 keyboard is locked. User needs to unlock the keyboard to continue the BIOS POST but how else do you do that,also i cant see any fuse like thingys on the mb that may seem burned ,seems like i only have two choices left one is to change the bios chip for anotherone exactly like it and see if it works ,or try to flash the bios,but before that see if i can boot up from a floppy right,and then learn how to flash such bios,i may had burned somehting when i was trying to figure out what every pin was for, learned my lesson to locate the manual for now on instead of shorting out pins for that reason,well t y for all your help,i ll continue to view any more help you may have and will post an answer if i find one t y friends

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#15
February 21, 2010 at 00:52:26
The fuse, if it's there, isn't going to look like fuses you're probably familiar with. It'll look like a resistor or other axial component. It'll probably show F1 or F2 or similar on the motherboard. The ones I've seen are physically close to the keyboard connector.

And it's very unlikely you'll see any burned area on the motherboard.

You're not really green until you're soylent green.


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#16
February 21, 2010 at 07:47:17

".....i may had burned somehting when i was trying to figure out what every pin was for, learned my lesson to locate the manual for now on instead of shorting out pins ..."

Yes, that's quite likely.
There's probably nothing wrong with bios chip, and on many mboards it's not removable in any case.

If the fuse DAVEINCAPS mentions was burned out, the keyboard would not work, but you wouldn't get the "unlock keyboard" message in that case in normal circumstances.


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#17
February 21, 2010 at 12:21:37
well its weird hardly any literature on the internet about his error message the is a blue rounded capacitor/resistor by the keyobard connector i wonder if thats whats burned out i d have to disore it and test it but how would i know if its cap or resistor and what its values would be, i cant find anything with the F1 printed on mb davidincaps,but thanks guys i ll will keep searching for more info

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#18
February 21, 2010 at 16:00:14
"....a blue rounded capacitor/resistor by the keyobard connector i wonder if thats whats burned out..."

See the part in Response 5
starting at ....

"Some mboards of that era had improperly made electrolytic capacitors installed on them that eventually fail as time goes by.........."



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