Lincoln Weld Pak 100HD

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Hello.  New to the forum from Michigan.  Been lurking here for a few months.  Hopefully will have my new Hobart 210 here this week.  Now onto the reason for the purchase...My old Lincoln Weld Pak 100 decided to finally quit this past weekend.  The wire feed motor has completely stopped feeding wire.  It has been acting up for the last month or so where it would feed wire intermittently.  This past weekend it has become not so much intermittent as it has more or less not fed any wire at all.  I unplugged the trigger switch in the machine and put a jumper in its place to verify it is not a switch problem.  I was standing there talking with my friend with this jumper in place and for no apparent reason it decided it was going to feed out about 4 inches of wire and quit.  That appeared to be the end as I have not been able to get it to work since.Where do I start to troubleshoot this thing?  The gas solenoid still clicks when the trigger is pulled.  The resistors on the board also get warm with the trigger held down even though I am not welding...no wire to weld with.  The problem started in December when I fired the welder up for the first time in about 4 years.  It worked wonderfully on some stainless I welded up the last time it was used 4 years ago.  It is not an issue with wire binding as I have removed the spool and motor is not turning.All help is appreciated.  I might just sell it when it gets fixed.  Assuming it can be fixed for a reasonable cost.
Reply:I would check your connections to the drive motor, and test the potentiometer (aka pot, the mechanism behind the knob) for the wire feed, my brother in laws pot went bad after about 10 years on his weld pak 100. good luck! always a chance the drive motor died, but would check all connections for voltage before jumping on that one.Hobart Handler 190 Century 90amp on FluxCraftsman 200amp buzzbox
Reply:I will check the pot and connections to the motor again.  When it initially started acting up in December the pot checked out fine, but I had no voltage at the motor connections.  Wires are fine though.  Is this all aiming towards a bad board or is there something else I should look at?  The transformer unit on the fan possibly?  I would think that if the gas solenoid is working that the fan assembly is feeding power to the board correctly.  Am I wrong in thinking this?Anyone with experience in fixing one of these is miles ahead of me on this.  I don't fix welders...just about everything else though.
Reply:I have checked the potentiometer again.  It is working properly.  Also checked the motor.  It is also fine.From what I understand the motor gets its power from the pc board.  No relay or anything to feed it.  Is this correct?  If that is the case I am left with the board being the last thing holding me up.  I can get it fixed for $52 or buy a new one for $110.If I am stuck buying the board, I know it is part number L9073.  There appears to be 4 versions of this board,  It appears that each one supersedes the previous version.  Can someone confirm that I can in fact buy any of the 4 versions of this board and have it work correctly.
Reply:Have the same issue. Was there as fix to this problem?
Reply:Must have weld voltage before wire feed will work.so if the weld relay on the pcb has worn out. no wire feed or spark.