HP LaserJet 5SI

How to Identify and Fix Common Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

Faulty power cords and connections are an uncommon but possible cause of a printer not turning on. Before suspecting a cord failure, ensure that there is power to the wall outlet and there are no conditions preventing the printer from turning on. Testing by substitution can confirm if a cord connection is the problem.
Restart devices

If your printer connects to a Wi-Fi network, disconnect your computer or mobile device from the network name (SSID), and then reconnect it to the same network name your printer is connected to. If the printer is available and has a ready status, the issue is resolved.

Turn the printer off then back on. If the issue persists, turn the printer off, unplug the power cord and then wait at least three minutes before plugging the power cord back in and turning the printer back on. If the issue persists, ensure the product is running the latest firmware available from HP.com.
Printer sleep mode

Check that the printer does not have sleep mode enabled: Go to Control Panel > Devices and Printers. Right-click the printer in question, then select Printer Preferences. Look for an option to disable sleep or time-out mode.

Some of the most common printer problems that most of us have experienced include paper jamming, slow printing, uneven printing, and wrong colour output. If you use your printer frequently, we know how annoying it can be to have persisting problems with the printer.
Start by checking your hardware

If you`re using a wired printer, make sure that the printer cable is properly connected from the printer to your PC. For wireless printers, check the wireless connection. Make sure the printer`s wireless option is turned on and available.

Your printer should have been packaged with a USB cable regardless of whether it is a wireless or wired printer. Plug the cable into your printer and your computer`s USB port. The direct linking should trigger your computer to recognize the printer and start up the software needed to complete the installation.
Turn the printer off then back on. If the issue persists, turn the printer off, unplug the power cord and then wait at least three minutes before plugging the power cord back in and turning the printer back on.
Battery Troubles:

If your HP laptop has a removable battery, remove it and reinsert it after a few seconds. Sometimes, a faulty connection can cause the power light to blink. If you can access a spare battery, try swapping it to see if the issue persists.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP laser jet 3015 "Upgrade Error Call HP Support"
ANSWER : rgtr

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HP LaserJet 5SI

HP 26 vs HP 29 cartridge compatibility
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HP LaserJet 5SI

HP 4250n error 13.05.00 Phantom Jam
ANSWER : Pull and reset the fuser. Make sure both sides are back into their position.

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HP LaserJet 5SI

HP 4250n – blurry text
ANSWER : What is the fuser? And how can it be changed?

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HP LaserJet 5SI

HP 4101MFP Hard Drive Question
ANSWER : To initialize: turn off – Press start and hold down while turning on, release after all three light light, you should see initialize disk hit check, and allow to boot.

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HP LaserJet 5SI

HP 9040 MFP Error code
ANSWER : bonsoir

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HP LaserJet 5SI

HP 4550N formatter board
ANSWER : You can replace it by finding the slot of DIMM, where the existing HP4550N formatter board is installed. More info is available here

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HP LaserJet 5SI

Reseting the ink levels for hp c7280,
ANSWER : I held the # and 6 down long enough to start a complete re-set of the printer But the Black ink level still shows as depleted when it is actually still half full.

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HP LaserJet 5SI