Multimeter Amprobe broken help

[funnel]

I need help figuring out what is wrong with my multimeter. It's an Amprobe 240. I don't know how it happened exatcly but the knob was acting weird for a few weeks with the screen going on and off when selecting the DC function. You can see in the attached picture the burnt trace I cleaned but didn't help. Without measuring anything the multimeter is showing 1.052 V DC, 25.86 kOhm, and 144.1 uA. I also get wrong readings for resistors using the relative button.

Anybody knows how to find out what's wrong? Can I fix it or is the main chip toast?

Thanks.

[retiredcaps]

Check the PTC right by the volt jack.  It should be around 1 kohm.

Check your burnt trace to make sure it is not conductive as per

http://mrmodemhead.com/blog/ideal-carbon-footprint/

[funnel]

Wow. Thank you. I scraped the carbon with an exacto knife and now it works perfectly. Thank you.

[retiredcaps]

I'm glad you got it working, but all credit/kudo should go to modemhead for taking the time to document and photograph the repair for everyone's benefit.