This is a known bug on some Toshiba lappies - and one of the reasons I updated my A215 BIOS 4 times in the last few months!
Not sure if this is what happened to you, but...
: Satellite A100-ST8211, A100-SP471, A100-ST1042, A100-ST1041, A105-S4001, A105-S4002, A105-S4004, A105-S4014, A105-S4051, A105-S4094, A105-S4144, A105-S4034, A105-S4054
, A105-S4102, A105-S4124, A105-S4114, A105-S4132, A105-S4134, A105-S4064, A105-S4024, A105-S4211, A105-S4201, A105-S4092, A105-S4084, A105-S4184, A105-S4194, A105-S4174, A105-S4164, A105-S4154, A105-S4342, A105-S4284, A105-S4274, A105-S4254, A105-S4244, A105-S4214, A105-S4204, A105-S4104, A105-S4074, A105-S4547, A105-S4334, A105-S4304, A105-S4294, A105-S4364, A105-S4344, A105-S4021, A105-S4031, A105-S4012, A105-S4011, A105-S4397, A105-S4374, A105-S4384, A105-S4022, A110-ST1111, A130-ST1311, A130-ST1312, A130-ST1313, A135-S2246, A135-S2256, A135-S2266, A135-S4499, A135-S4498, A135-S4488, A135-S4478, A135-S4507, A135-S4487, A135-S4477, A135-S4467, A135-S4457, A135-S2396, A135-S2386, A135-S4637, A135-S4527, A135-S2356, A135-S2346, A135-S2336, A135-S2376, A135-S2326, A135-S4517, A135-S2306, A135-S4727, A135-S4677, A135-S4666, A135-S4656, A135-S2426, A135-S4447, A135-S4437, A135-S4427, A135-S4417, A135-S4407, A135-S2296, A135-S2286, A135-S2276, A200-ST2041, A200-ST2042, A205-S4617, A205-S4639, A205-S4618, A205-S4567, A205-S4577, A205-S4587, A205-S4597, A205-S4629, A205-S7459, A205-S7458, A205-S7456, A205-S7443, A205-S7442, A205-S4797, A205-S4787, A205-S4777, A205-S4707, A205-S7468, A205-S7466, A205-S7464, A205-S4607, A205-S4578, A205-S4557, A205-S4537, A205-S4638, L35-SP1011, L35-S2194, L35-S2174, L35-S2161, L35-S2316, L35-S2366, L35-S2206, L35-S2171, L35-S1054, L35-S2151, M200-ST2001, M200-ST2002, M205-S3207, M205-S3217, P100-ST7111, P100-ST1071, P100-ST9612, P100-ST9412, P100-ST7211, P105-S921, P105-S6002, P105-S6014, P105-S6054, P105-S6034, P105-S9337, P105-S6227, P105-S6217, P105-S6207, P105-S6197, P105-S6187, P105-S6177, P105-S6167, P105-S6157, P105-S6147, P105-S6134, P105-S6124, P105-S6114, P105-S6104, P105-S6102, P105-S6062, P105-S6022, P105-S6084, P105-S6064, P105-S6024, P105-S9312, P105-S6004, P105-S6012, P200-ST2071, P205-S6297, P205-S6298, P205-S6247, P205-S6287, P205-S6257, P205-S6267, P205-S6237
Tecra A7-S712, A7-S612, A7-ST7711, A7-ST7712, A7-ST5112 Issue
The computer models listed above may display a "Password =" prompt when the computer is turned on, even though no power-on password has been set. If this happens, there is no password
that will satisfy the password request. If the computer is turned off and back on again, it is very likely that the same password prompt will appear. The computer will be unusable until this problem is fixed.
If the problem has not happened yet, you can prevent it from happening in the future by upgrading the BIOS to the newest version.
The occurrence of this problem on any particular computer
is unpredictable -- it may never happen, but it could happen any time that the computer is turned on. If this problem does occur, it will be necessary to send the computer to a Toshiba Authorized Service Provider, who will fix the problem at no charge to you
If this problem has not yet occurred on your computer, then click the following link to download and install BIOS version 1.40. This BIOS displays a power-on password prompt only when a power-on password has actually been set via the BIOS Setup program.
You may also browse for a newer version of the computer's BIOS at pcsupport.toshiba.com.
For more help, see Support Bulletin 98081213 Obtaining downloads and support docs from the Toshiba Support website.
If the problem has already occurred on your computer, then please make arrangements with a Toshiba Authorized Service Provider to have this problem fixed at no charge. To locate a Toshiba Authorized Service Provider (ASP), please visit Toshiba's Global ASP Locator at http://pcrepair.toshiba.com
BTW, I've heard that this only happens when you boot up on battery power.
Maybe you can confirm this...