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HP Pagewide P77740z changing serial number
Hello,We stumbled upon a problem that we can not solve with a product. Surprisingly, we had another suitable unit we can exchange the engine with. So... -
HP MFP P77740 Pagewide
Anybody know how a P77740 detects that the head cleaning/ wiper unit is in place?
There is a blue plastic tag on top of the wiper unit that moves...
