HP Printer Not Turning On? Here's How to Repair the Power Supply

Is your HP printer not turning on, despite being plugged in and switched on? It could be a problem with the power supply. A faulty power supply can cause your HP printer to refuse to turn on, or it may turn on and immediately shut off. But before you go out and buy a new printer, you can try repairing the power supply yourself.

Here's what you'll need to get started:

• A multimeter (to test voltage and current)
• A soldering iron
• A replacement capacitor or diode (if necessary)
• The correct power adapter (32V, 1560mA)

First, unplug the printer and locate the power supply. This is usually a small black box that connects to the back of the printer. Check to see if the power supply is warm to the touch. If it is, this could indicate that the power supply is working, but there may be a problem with the printer itself.

If the power supply is cold, check the power cord and make sure it's properly connected. If the cord is in good condition, test the voltage output of the power supply using a multimeter. The power supply should output a constant 32V and 1560mA. If the voltage is lower or higher than this, the power supply may be faulty and in need of repair.

Next, check the power adapter you're using to make sure it's the correct one. Using the wrong adapter can cause the printer to not turn on, or it may cause damage to the printer. The correct power adapter for HP printers is 32V, 1560mA. If you're using a different adapter, replace it with the correct one.

If the power supply or power adapter is faulty, you may need to replace a component such as a capacitor or diode. These components can fail over time and cause the power supply to malfunction. If you're comfortable with soldering, you can replace these components yourself.

Alternatively, you can purchase a replacement power supply or power adapter from HP or a third-party supplier. Just make sure you're buying the correct one for your printer.

In summary, if your HP printer is not turning on, it's likely a problem with the power supply. Check the power supply for warmth and test the voltage output with a multimeter. Make sure you're using the correct power adapter and replace any faulty components if necessary. With a little know-how and some basic tools, you can repair the power supply for your HP printer and get back to printing in no time.

See my video for details on repairing HP printer power adapters and power supply tests.