Reverting a BIOS to a pervious version question.

[wedoe21]

Iv had my Dell inspiron laptop for 6 ish years. Its a solid system, i like it. The only physical problem its had was needing a replacement battery. Although getting 4 years outta a laptop battery seems pretty decent. Its been floating between my dad and sister since i graduated in '05 so it's seen its fair share of use. Thats enough background on to the question. some time in 03 or 04 i updated the BIOS from version a08 to a10. I think the A10 version changed the fan speed and temp settings, because right after the flash the fans changed their habits. Before the update the fans would spin at a low rpm all the time and then ramp up the speed when extra cooling was needed. After the update the fans would either constantly spin at max RPM or they would alternate between stopped and MAX POWER!!! We just ignored it for a few years but now its getting to the top of the annoyance list. My plan is just to go back to the old A08 BIOS and see if that fixes it. It should be pretty simple just a normal BIOS flash. I have updated a number of bios'es but iv never gone back a version before. It dosent seem like going back a version will be any different but since iv never gone back a version I wanna ask.

My question is: Can i flash my bios to a previous version?