How to Access the Power Supply on an HP OfficeJet Pro 9015/9018/9025 (OfficeJet Pro 9000 Series) When It Won't Turn On

Question

I watched your video about disassembling (uncasing) the HP OfficeJet Pro 9000 series-models like the 9015, 9018, and 9025. My printer won't power on at all, and I suspect the power adapter (or power supply) is bad. How do I access the power supply on this type of printer to check or replace it?

Answer

First: "No power" is not always the power supply (common causes to consider)

You're absolutely right to suspect the power adapter/power supply, but on the HP OfficeJet Pro 9000 series, a printer that is completely dead can also be caused by:

1. Faulty external power adapter (most common and easiest to check)

   • Adapter fails internally, or outputs unstable voltage under load.

2. Bad DC jack / loose connection at the printer

   • The port can crack from stress or develop a poor solder connection on the mainboard.

3. Mainboard failure (very common on "dead" units)

   • Power-management components can fail, short, or burn-especially after surges, liquid exposure, or long-term heat stress.

4. Shorted peripheral pulling the power rail down

   • A short in the carriage, pump, control panel, scanner assembly, or even a damaged cable can prevent the unit from powering.

If you have a multimeter and want a safe "first check," verify the adapter output matches its rated voltage. Even if it reads correctly with no load, it may still collapse under load-so a "good-looking" voltage reading doesn't always guarantee the adapter is healthy.

What you'll typically see when the power supply is the problem vs. the mainboard

While every failure is different, these patterns are common:

• Likely adapter issue:

  • Absolutely no lights, no screen, no sound, and the adapter output tests low or fluctuates.

• Likely mainboard/DC input issue:

  • Adapter tests fine, but printer remains completely dead.

  • Sometimes you'll see a faint blink or brief power attempt then nothing.

  • In some cases, the adapter may get unusually warm because the printer is shorted.

How to access the power supply on HP OfficeJet Pro 9015 / 9018 / 9025

On this printer family, the power supply is not something you can reach by removing a small side panel. It's more of a "remove the top, then the shell" approach. In general terms, the order is:

1. Remove the scanner assembly (top unit)

   • This usually involves removing screws and carefully disconnecting the scanner/control-panel cables.

   • Be gentle with ribbon cables-damage here is easy and can create new problems.

2. Remove the outer case (printer shell)

   • After the scanner is off, you can remove the casing panels to expose the internal frame and modules.

3. Remove the power supply as a complete unit

   • Once the shell is off, the power supply module typically comes out as one piece (a single assembly).

   • You'll disconnect the power harness and remove the fasteners holding the unit to the frame.

That matches what you suspected and aligns with what we see in the shop: scanner off → case off → power supply comes out as a whole unit.

Practical cautions before you replace anything

A few important notes that save people from repeat failures:

• Use the correct adapter/power unit rating.
  Using the wrong voltage/amperage can cause immediate failure or intermittent behavior.

• Inspect for obvious shorts or liquid damage before installing a new power supply.
  If the mainboard is shorted, a brand-new adapter can get stressed right away and fail again.

• Check the DC jack area carefully.
  Even if you replace the adapter, a cracked jack or bad solder joint can still leave you with a "dead" printer.

• If you see burnt smell, scorch marks, or corrosion, assume mainboard risk is high.
  In those cases, replacing only the adapter may not solve it.

About error codes

In a true "won't turn on" situation, you often won't get an on-screen error code because the printer never boots far enough to display one. So the absence of an error code doesn't mean the problem is simple-it often means the failure is at the power-delivery or mainboard level.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. So, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We offer an in-person evaluation and repair service via our local diagnostic facility: Printer Repair Service (https://bchtechnologies.com/printer-repair-service). Given the high demand, we operate on a first-come, first-served basis, so it might take a few weeks before we can get your printer scheduled to drop it off. Our services are structured to repair either a whole printer or specific parts, with clear instructions on how to proceed. However, we acknowledge that our rates aren't the most economical. Thus, we highly recommend that you resort to self-help via online research. You can start by checking out YouTube or visiting our YouTube channel's homepage: BCH Technologies on YouTube (https://youtube.com/@bchtechnologies). Look for specific videos using the search icon next to "About" on the right-hand side of the menu bar. I receive dozens of queries every day asking about videos for specific topics. Having created videos over the past nine years, it's challenging to remember every single one. Therefore, using YouTube's search function would be most efficient. Plus, YouTube might suggest relevant videos from other channels that could assist you.

Thanks again for reaching out and for supporting BCH Technologies. I truly appreciate it, and I hope this helps you approach the problem in the most efficient (and least costly) way.