Laserjet 5 error/service 62.1

[katmac1]

I have a unit showing the following message "62.1 service"

Is this an error message? The word "service" is throwing me.
If this is an error message, then it is my understanding that the
memory is not functioning properly.

Since we purchased this unit from Printertechs.com, I am wondering
if they will have this memory unit available for purchase if it needs
replacing.

Thanks!

[David]

The 1 would indicate that SIMM 1 is bad. 0 would be internal memory and 1,2,3,4 would be those slots!