Question about Toshiba Computers & Internet
Hi, I have a Toshiba U205 S5057 with a bios lock. I have searched everywhere and am unable to find a reset. I believe that the cmos battery plugs in and is located on the lower right side of mother board and has a two pin male molex connector. I removed this for two days and it did not reset the bios. Unless there is another battery somewhere which I am unable to locate, this fix is not going to work. Every thing that I've found which is very limited tells me that it's either a short across a pair of solder points or a short from ground to a solder point. If that is the case, would you happen to know where this is located on the mother board if I am right and which method to use to reset the bios. If I'm wrong, do you have any idea how to reset bios on this machine? I really need a little help before I short a chip and ruin the mother board. Thanks for any help you can provide. RC
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Posted on Jan 02, 2017
Replacing the existing BIOS chip with a new one you can buy from your specialized electronic shop or your computer supplier. It's a quick operation if the chip is inserted on a base and not soldered to the motherboard, otherwise you'll have to unsolder it and then put the new one. In this case would be more convenient to solder a base on which you'll then plug the new chip, in the eventuality that you'll have to change it again. If you can't find the BIOS chip specifically made for your motherboard, you should buy one of the same type (probably one of the ones shown above) and look in your motherboard manufacturer's website to see if there's the BIOS image to download. Then you should copy that image on the chip you bought with an EPROM programmer.
Whether is the method you use, when you flash the BIOS not only the password, but also all the other configuration data will be reset to the factory defaults, so when you are booting for the first time after a BIOS flash, you should enter the CMOS configuration menu (as explained before) and fix up some things.
Also, when you boot Windows, it may happen that it finds some new device, because of the new configuration of the BIOS, in this case you'll probably need the Windows installation CD because Windows may ask you for some external files. If Windows doesn't see the CD-ROM try to eject and re-insert the CD-ROM again. If Windows can't find the CD-ROM drive and you set it properly from the BIOS config, just reboot with the reset key, and in the next run Windows should find it. However most files needed by the system while installing new hardware could also be found in C:WINDOWS, C:WINDOWSSYSTEM, or C:WINDOWSINF .
Posted on Feb 03, 2010
you need to remove all at same time and memory modules too, and after remove the cmos battery, try to find a passw clear switch on the motherboard nearby cmos battery.
Posted on Feb 14, 2010
There are 2 ways you can reset your bios.
1. On the motherboard there is a small watch battery. Remove this battery along with the power cable from the power supply. Hold down the power button to fully discharge the system. Wait 2-3 minutes then reinstall the battery and plug in your system. Your reset is now complete
2. Some motherboards have a 3 pin jumper by the battery. Lets say that the jumper is on pins 2 and 3. Remove the jumper while the machine is OFF and place onto pins 1 and 2. Power on your machine for a minute. (Note: Your system will not POST). Shutdown your machine and put the jumper back to pins 2 and 3. Your reset is now complete
This is a great troubleshooting step for those of you having POST issues or no POSTing at all. Like other troubleshooting steps, this will not always work but usually will depending on the problem.
Please let me know if you have any further questions or concerns.
Posted on May 05, 2010
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