20 Most Recent IBM 6400-I2S Matrix Printer - Page 3 Questions & Answers

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not sure what you call comb guard, but most IBM Selectric parts are secured in with screws, but sometimes pivot screws from the side, loosen nuts, screw out and see if your "comb guard" comes out. As I say is it on top of keyboard or under the keyboard we might have called it something else many years ago work on these machines.There is quite of IBM machines on ebay,

es it wifi connnect it tu el computer go tu setting en your computer click on keyboard you got plug it en you computer tu wifi it

Nothing you can get around. It needs a new fuser which heats the toner to bond to the paper. You will need a service provider. If you are a business, you should look into service contracts where you pay a per copy service and everything is covered.

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most often caused by a week or broken spring on the return operational shaft

It could need a keyboard rebuild or the flat cable between the keyboard and printer may be loose or have briken wires