maybe we have the same problem here, i got Vaio VGN fs630/w stop working on boot and cannot enter BIOS, the keyboard not responding.
when i googling somewhere i found this
http://esupport.sony.com look at the FAQ, they called this is the power INTERMITTENT problem, do you used the original batery and AC adaptor?
my AC adaptor stolen by the f**cking thief, i bought a cheap replacement AC adapter, i dont know this will make me in trouble like this. the AC adapter have maximum voltage which is must be the same as the DC power needed, the volts is correct 19.5 Volts for VAIO VGN FS630/w, but we dont know since this is the cheap one not the original battery by sony. maybe the power is over and make the capasitor around the processor overheating, also can burn you PC or battery.
the solution is.. do the Power task which i found it on esupport
Follow this procedure to troubleshoot no power or the computer does not turn on.
IMPORTANT:
- While following this procedure, note the LED status at each step. This will provide additional information for the technician if repair becomes necessary.
- If model-specific information is required to complete any of the steps in this solution, refer to the operating instructions supplied with the product. Manuals are available online in the Manuals/Specs/Warranty section of the Sony® eSupport Web site.
NOTE: Some computers are designed with hooks above the LCD screen that secure the lid when closed. A switch inside the holes below the touchpad [FIG. 1] detects when the lid is closed and latched. If the switch is stuck, the computer may not turn on properly. Check to make sure the switch is working properly.
- Connect the AC adapter [FIG. 2] into a known working AC outlet and to the DC jack on the notebook.
NOTES:
- Do not connect the AC adapter to a surge protector or extension cord.
- If the DC jack on the computer is loose or damaged, the computer may require service.
- Some AC adapters have a POWER LED indicator and can be confirmed as receiving power by ensuring the LED is lit. If the AC adapter is damaged or the LED is not lit when plugged into a working AC outlet, the adapter must be replaced. A replacement AC adapter can be obtained from the Sony® Direct Accessories and Parts Center Web site or by calling (800) 488-7669.
- Attempt to turn on the computer.
- Press and hold the Power Switch for 15 seconds.
- Attempt to turn on the computer.
- Remove the battery.
- Disconnect the AC power adapter.
- Press and hold the Power Switch for 15 seconds.
- Connect the AC power adapter.
- Attempt to turn on the computer. NOTE: If the computer turns on without the battery, connect and charge the battery for 24 hours.
- Disconnect all external devices that are connected to the computer. NOTE: These devices include, but are not limited to, a modem, floppy disk drive, network connection, USB device, printer, keyboard, or mouse.
- Attempt to turn on the computer.
- Remove any additional Random Access Memory (RAM) that was installed in the computer.
- Attempt to turn on the computer. NOTES:
- The troubleshooting steps listed above should resolve your issue. If you have completed all of the steps and the issue is not resolved, service may be required. The Sony® eService Web site at http://eservice.sony.com/ can assist you in obtaining service from a Sony Service Center or locating a Sony Authorized Servicer.
- When shipping the computer for repair, include all notes of the LED status that displayed during troubleshooting.
enjoy...
