Broken, Please help!: Sencore Super Mack

[Mike52787]

Hey, I recently picked up a super mack from a local store for $20, and it seems to be broken. Thankfully, I received all the tips, with a few extras, and a setup chart. However, when I turn it on, and turn up the filament voltage, the meter displays nothing. no matter what I do it seems to be dead. the light comes on on the side it is switched to, and it seems to power up, however I do not want to plug it into my TV without a readout on the filament voltage in the odd event it would destroy the quite nice picture tube in it. I am a relative novice with test equipment, and would love to get this working. I have not opened it up yet either. just looking to get more info on hopefully fixing it first. Thanks in advance for any info.