AB Dick 9850 Error Code

Im new to this forum another local printer suggested I check it out as it has helped him. While running my AB Dick 9850, finished a short run job, cleaned up, reinked, hung my new plate, but when I pressed the start button, a letter H appeared on the screen and nothing would turn on.
I shut the main switch off and pulled the power plug waited 20 minutes pluged it back in turned the main on, the press beeped once and displayed the H again.
I shut every thing back off for an hour turned back on and everything works. Printed 4000 sheets stopped the feed and air, after loading another 4000 sheets the feed or air would not turn on, I shut press off then tried to start again but the H appeared again.
Any thoughts or suggestions.
Thank You

 

Hi sir;

Please do this;

1) Perform a visual inspection : look for loose and broken wires, improperly seated connectors, loose or broken wires
misset switch, missing jumpers. and so on.

Chech for obviously damaged component(components burned or discolored due to overheating);
Dust + dirt + tear +wear

2) Reseating Boards and components:

Edge connectors are a common souorce of problems. Power down the system and remove the PC boards. Examine the edge connector
for contamination and clean with contacts cleaner contacts. Reseat any loose components such as scoketed ICs) . Reseat the
boards and power up.

3) Power supply checks:

Check the power supply for missing voltages and voltages out of spec. A digital multimieter DMM can be necessary, as
voltage specifications are quite tight: logic supplies for example: must be within + 5% percent of 5Vdc. All the
multiple supplies and all must be checked.

 

I'm checking everything.
Thank You

 

Thank you Sir .

Blessing.