Satellite L455 - Power plug and battery LEDs on and it flashing orange

I have a Satellite L455 that has been working perfectly for over six months now but from two weeks ago it started behaving strangely.
I switched off the machine normally in the evening as I was going to sleep. In the morning when I switched it on it powered on, HDD and Power On Leds blinked blue for a few seconds then they went off. Machine did not boot. I tried to switch it on again and it did the same thing. Then I saw the 'power plug on' and 'Battery On' Leds flashing orange at the same time. I unplugged the power adapter. The two leds were still flashing but machine will not power up. I removed the battery for a bout 5 minutes then reinserted it and the machine worked fine the whole day.
I switched it off removed the power plug and in the morning still it would not boot until when I removed the battery for a few minutes then it works again. The battery is charging fine as when I remove it and reinsert it even without plugging power cable still fires up and perfectly works.
Then I removed the battery and the power plug and pressed the power button for thirty seconds to discharge the machine and then put back power and battery and it worked until I switched off again and removed power then it did not come on again.
If I just shut down machine and I dont switch off power plug then I can switch back on and work with the machine with no hassle even for three days continuously.
What could be wrong? Any help will really be appreciated.
Regards
Yusuf

Hi chidzungo,
This must be definitely a hardware malfunction but its strange why it appears every day after you have shut down the notebook. Do you use original Toshiba AC/DC adapter and battery? Have you connected external devices to your notebook? If yes remove them before you turn on your notebook.
What BIOS version is installed at the moment? You should look on Toshiba website for an update. BIOS update could also help and its worth a try.
Before you start the BIOS update read the BIOS update instructions [HERE|http://forums.computers.toshiba-europe.com/forums/ann.jspa?annID=60]
Satellite L455 seems to be an US model so the BIOS update can be downloaded on Toshiba US page but check the exact part number first:
http://www.csd.toshiba.com/

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