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HP Recommended
HP Recommended
Probably power supply: from Google AI quote:
To replace the power transformer in an HP Envy 7640 printer, you'll need to carefully disassemble the printer to access the power supply. This involves removing the printer's case, disconnecting any necessary wires, and then replacing the old transformer with a new one. Once the replacement is complete, you'll need to reassemble the printer, ensuring all connections are secure
There is a replacement procedure here for some Officejet printers, probably different from the envy.
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