Acer Aspire 7220: Power button and HDD led indicator keeps blinking

Hi , I've buyed an Acer Aspire 7220 like 1 year ago and after a recharging(I think) the laptop won't start up... The power button and HDD status indicator keeps blinking simultaneously like 1 second until I remove the battery or the charger...
Here's a list with all things that I've tried...(BTW , i'll have some grammatical mistakes...I hope you guys going to understand me :ange: )

1. Cleaning the fan....
2. Drain all the power from the laptop(with battery and charger disconnected of course) then tried to start it up with battery without charger , with charger without battery and with charger and battery... None of these worked...
3. I've also checked the power contacts and every wire...All are connected

4. Right now I'm trying to do a BIOS FLASH...
P.S I've had same problem like 5 weeks ago and I think the BIOS FLASH was the solution...
Going to post again if the BIOS FLASH will work.

It takes a looot of time....
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  1. The BIOS FLASH didn't worked...
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