Lost digital readout

Changing the battery might have triggered the problem -- or maybe not.

Have you checked the obvious stuff like fuses and loose connections at the fuse panel. It's always worth checking to see if the battery is installed correctly too -- positive to positive and negative to negative although the car should have other (major) problems if those connections were reversed. Also, there is an auxiliary wire on the main positive battery connector on some cars that feeds several circuits. Has that wire been mistakenly broken or disconnected when the battery was changed?

I've had trouble with fuses corroding on my Volvo and that results in intermittent connections. Finally, I just replaced all the fuses and cleaned the metal on the fuse holders.

TKM

I can not think of why this happened after you changed the battery is the display not working at all or are some of the functions working ? @ this point before letting your local mechanic look @ this a trip to the dealer is in order there should not be a large diagnostic charge to look & inform you of the cause & cost to repair Happy Thanksgiving Glenn K Volvo Certified Technician ASE Certified Technician

if he is competent, i'd offer $225 & let him @ it. electrical faults are amazingly annoying. it sounds like an ic fault, but if you caused it you are unlikely to find it. pros have the luxury of swapping in good parts @ random until they find it w/o purchasing anything. inelegant but it works.

The miles should be a digital display on the dash. So they are apparently visible but switched to km. But the speedometer doesn't function and other digital displays don't light up. There is a specific sequence for disconnecting and reconnecting the battery cables on the V70. If you didn't follow that sequence and shorted or sparked the battery you conceivably could have zapped a chip.

Removing a battery you should always disconnect the negative lead first to prevent spark's. Installing the new battery connect the positive lead first. If you have done it this way it is pure bad luck - unfortunately on your own risk. Either a fuse is burned in the fuse box (does not smell), check your owners manual. If not found - a circuit fuse on the speedometer backplate (this does smell burned) is burned. $ 275,- for fixing the problem sounds reasonable. Also check a garage that is specialized in fixing car electric circuits because Volvo might state that you need a speedometer replacement. Good luck ! Cheers Per