Sinds wanneer wordt je PC gelockt na 3x foute wachtwoord?
(Alsin... ZO ZWAAR gelockt)
Als er geen losse batterij zit, dan heb je waarschijnlijk een DALLAS chip (zie onder) daar zit de batterij ingebouwd.
Wellicht is dit wat:
If your battery is soldered in, you could discharge it enough so the CMOS loses power, but make sure it is rechargeable so you can get it up to speed again. To do this, connect a small resistor (say 39 ohms) across the battery and leave it for about half an hour. Some motherboards use a jumper for discharging the CMOS; it may be marked CMOS DRAIN. Sometimes (depending on the motherboard), you can connect P15 of the keyboard controller (pin 32, usually) to GND and switch the machine on. This makes the POST run, which deletes the password after one diagnostic test. Then reboot.
Very much a last resort is to get a multimeter and set it to a low resistance check (i.e. 4 ohms), place one probe on pin 1 of the chip concerned, and draw the other over the other pins. This will shock out the chip and scramble its brains. This is not for the faint hearted, and only for the desperate - use a paperclip or desolder the battery first! We assume no responsibility for damage!
The CMOS RAM is often incorporated into larger chips:
P82C206 (Square). Also contains 2 DMA controllers, 2 Interrupt controllers, Timer, and RTC (Real-Time Clock). It is usually marked CHIPS, because it is made by Chips and Technologies.
Clear by shorting together pins 12 nd 32 on the bottom edge or pins 74 and 75 on the upper left corner.
F82C206 (Rectangular). Usually marked OPTi (the manufacturer). Also contains 2 DMA Controllers, 2 Interrupt Controllers, Timer, and Real-time Clock.
Clear by shorting together pins 3 and 26 on the bottom edge (third pin in from left and 5th pin from right).
Dallas DS1287, DS1287A, Benchmarq bp3287MT, bq3287AMT.
The Dallas DS1287 and DS1287A, and the compatible Benchmarq bp3287MT and bq3287AMT chips have a built-in battery, which should last up to 10 years; there should not be another battery on the motherboard.
Clear the 1287A and 3287AMT chips by shorting pins 12 and 21. You cannot clear the 1287 (and 3287MT). In this case, replace the chip (but make sure it is a 1287A!).
Although these are 24-pin chips, the Dallas chips may be missing 5, which are unused anyway.
Motorola MC146818AP or compatible. A rectangular 24-pin DIP chip, usually in a socket, found on older machines. Compatibles are made by several manufacturers including Hitachi (HD146818AP) and Samsung (KS82C6818A), but the number on the chip should end in 6818.
Although it is pin-compatible with the Dallas 1287/1287A, there is no built-in battery, which means it can be cleared by just removing it from the socket for a few seconds and replacing it, but shorting pins 12 and 24 is a safer option.
Dallas DS12885S or Benchmarq bq3258S. Clear by shorting pins 12 and 20, on diagonally opposite corners; lower right and upper left. (try also pins 12 and 24).
Succes!