mastech DC POWER SUPPLY

[westerjimmy495]

The current display stopped working still has the current just no display anyone ever seen this have not removed cover yet getting idea's on what to check any suggestions ...Thanks  [/img]

[bob91343]

I never looked at those displays but you can see if there is a poor connection.  Otherwise you may have to replace the display, depending on what's wrong.

Pull the cover and probe around looking for loose connections.

[rsjsouza]

The displays on those Mastech power supplies are usually 7106- based DMMs totally independent of their main board, so it becomes almost a replaceable part entirely.
For it to die completely, I would suspect power supply to the ammeter (a broken wire, perhaps?) or a complete breakdown of the 7106 (much rarer occurrence IMO).