Hi,
New member, hopefully will find lots of help on here. Just bought a volvo V70 2002 a few weeks ago and have been sorting it until i'm happy it's 100% right.
I also have this problem. Took the siren out and checked the board and it is fried / badly burnt, smells off a fire, surprised it hasn't actually went up. Obviously the previous owner has avoided the warning message for a long time.
Does anyone have a spare circuit board or old unit?
Don't fancy paying £155 for a new one as already spent more than the purchase price sorting out all the faults with this car.
Did spend some time hacksawing through it neatly so i could tape it up once i had replaced the battery which looks like wasted time with a chargrilled board