This may or may not work. I have used this method on some laptops in the past and was successfull part of the time.
See if you can locate your cmos battery and determine if it’s soldered to the motherboard or plugged into the motherboard. If the cmos battery plugs in, unplug your ac adapter, remove your battery, hold the power button in for about 15 seconds (this drains the capacitors on the motherboard), then unplug the cmos battery and jump out the two terminals on the motherboard where the battery plugs in for about 10 seconds. Plug it back in, install battery and ac adapter and hopefully the password will gone. Hope this works for you.