Toshiba A135-S2276: đòi pass CMOS ?

Không hiểu đã đã chọc ngoáy cái gì mà 1 hôm đẹp trời, con laptop Toshba A135-S2276 đòi phải nhập pass CMOS. Mà cái này em có cài đặt bao giờ đâu. Triệu chứng như sau:

Scene 1: Khởi động logo Toshiba
Scene 2: Màn hình đen, text box mà blue: Enter Password

Em đã cố search google, đã gỡ RAM, tìm chỗ đã chập mạch mà không tìm thấy và em cũng khôgn dám đi xa hơn nữa.
Mong bác nào đã sửa được lỗi này rồi thì xin chỉ giúp.
Cảm ơn rất nhiều.

Dưới đây là những gì em thu lượm được
Remove the wireless NIC from the bottom on the unit and look for PAD2 (should be
in the corner next to where the antenni come out. Short this and restart the machine
Again remove the wireless nic and look for jumper c738 or . Short it and restart the
machine. it only takes 5 mins max to do as sometimes you have to solder the terminals
together to get it to work correctly.
OR
Power unit off. Disconnect AC power. Remove battery. Remove the memory cover
screw, memory cover and the memory modules. Peel back mylar from JOPEN1 solder
pad. Short solder JOPEN1 solder pads for 30 seconds. Replace mylar. Replace
memory modules. Replace battery. Power up unit. If all is well, replace memory cover
and screw. Start it up it should then ask to pick either F1 - Continue or F2 - Setup.
Click on set up and go to the security tab and then change both the user password and
the superviser password to something you will know (letmein is a good one for this
purpose). Then go to exit and exit saving changes. The computer will then restart and
ask you for the password in which you just set it. It should then start up like normal.
OR
1. Dissasemble the laptop
2. Clip jumper wire to ground on motherboard (usually find this around a chassis
screw hole)
3. clip a paperclip to the other end of the jumper wire
4. Run the paper clip across all the pins on the eeprom chip. (just run it over any chip
you suspect it may be)
5. Reasemble the Laptop
Thats it your done if you did it correctly you will have reset the chip clearing the
passwords and the computer will start up and go into bios or windows as long as there
is no hdd password as well
(also this is obvious but make sure you have no power or battery supplied to the
mother board while doing this)
OR
The last way is to call toshiba (you will need to be an authorized tech) and they will
issue a challange/response code that will generate a backdoor password for onetime
use to let you in.
1. At the BIOS password prompt ("PASSWORD = "), press and release the following
keys, one after another:
Ctrl, Tab, Ctrl, Enter
toshiba bios password solution for Centrino/P4 laptops? | 1 of 1 http://techrepublic.com.com/5208-623...rumID=101&thre...
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Ctrl, Tab, Ctrl, Enter
The computer's response should be:
PC Serial No.= XXXXXXXXX
Challenge Code= XXXXX XXXXX XXXXX XXXXX XXXXX
Response Code=
2. Call Toshiba ASP Support. Explain to the support technician that you need a
Response Code to remove a BIOS password. Recite both the PC Serial No. &
Challenge Code to the support technician. The support technician will verbally issue a
Response Code to you.
3. Enter the Response Code at the "Response Code=" prompt, and press Enter.
The computer's response should be: "Valid Password Entered. System is now starting
up."
4. Once Windows has finished loading, restart Windows: Start > Shut Down > Restart.
5. Once the screen image is blank, press and hold the Esc key.
6. Release the Esc key once you see the prompt: "Check System, than press [F1] Key"
7. Press the F1 key.
The BIOS / CMOS Setup screen should appear. Follow these steps to de-register the
password:
1. Press 'P' to jump to the Password field. "Registered " will be highlighted.
2. Press the spacebar to change "Password= Registered" to "Password= ".
3. Press the spacebar and press Enter. The BIOS should respond with "New Password
= ".
4. Press Enter again. The BIOS should respond with "Verify Password= ".
5. Press Enter again. The BIOS should respond with "Password= Not Registered".
6. Press the End key. The BIOS should respond with "Are You Sure?".
7. Press Y.
The computer will restart, and load Windows, without requesting a password.

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