Protek 9902AQ not functioning

The voltage reading is stuck in -8.6v and resistance range does not give the right value .I have checked most of the surrounding capacitor values ,resisters,diodes,and transistors but in vain .what could be the problem.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0

crwdns2944067:03crwdne2944067:0:

Hi,

What is the model number of the DMM?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

Try a new battery first. If not I’d recycle it and buy another.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

The model is protek 9902A it is a bench top and it is electric it does not have any batteries.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0