Toshiba Satellite P10-833. Sudden power down

Notebook - Toshiba Satellite P10-833 PSP16Exxx.
Problem - Sudden power down.
The solving of this problem are described by Toshiba.
I've downloaded and installed BIOS 1.50 on my notebook.
But the problem remains.
Help me, please.
Dmitry.
Message was edited by: dvedeneev

Hi BC,
A series of beeps (usually in a pattern of long and short) usually indicate a problem with the main-board in your notebook. Unfortunately, there is no published documentation about the beep pattern to assist with interpretation so the usual advice is to refer the notebook to an authorised service agent who can run diagnostic tests against the notebook.
The normal boot sequence is to run a POST to check the viability of the system basic components followed by the BIOS load and then finally the operating system. The symptoms you are experiencing indicate a problem in the POST, but without suitable diagnostic equipment it would be difficult to pinpoint exactly.
regards,

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