Would you know if the system has the Inmail VM chip, or the VMP-U(40) voicemail card? If it is the card, it is a copy of the active voice programming. It had the option of using a CF or HDD. If it has the HDD then it probably has gone bad. There is a jumper on board to select one or the other. I believe you can connect a monitor and keyboard to the front edge and watch what is going on during a reboot. In either case you will need a copy of cosessions to communicate with the VM. A copy of the HW manual will be helpful. It outlines the LED indications on the card.
LED No. Name On Flashing Off
1 AP1 Application Software Green on(Run no errors) Amber (Run
with errors) Red (Not running)
2 AP2 Not Used Not Used Not Used
3 DRIVE Red access Not Used No access
4 CF POWER Red for ETU power Not Used No ETU power
5 LIVE Not Used Red every 125ms in operation Operation shutdown
6 SW3 in RUN Red (do not remove ETU Not Used Not in RUN
7 SW3 in SHUTDOWN Red (ETU can be removed) Not Used Not SHUTDOWN
8 Power Red with KSU power) Not Used No KSU power
9 Development only Not Used Not Used Not Used
10 CH1 Red (Off-Hook) Not Used On-Hook
11 CH2 Red (Off-Hook) Not Used On-Hook
12 CH3 Red (Off-Hook) Not Used On-Hook
13 CH4 Red (Off-Hook) Not Used On-Hook
14 CH5 Red (Off-Hook) Not Used On-Hook
15 CH6 Red (Off-Hook) Not Used On-Hook
16 CH7 Red (Off-Hook) Not Used On-Hook