DIY Projects: How to Make a Charger Port for an HP Pavilion m3

Your HP Pavilion m3 convertible won't charge because the small round port on the side is cracked, loose, or completely torn out. This page gives you the exact parts, tools, and safe steps to replace that DC jack yourself.

What you need before you start

• DC Power Jack Cable: The exact replacement part for your HP model (e.g., m3-u001dx).
  Check the pin count: m3 models typically use a 5-pin or 6-pin ZIF connector.
• Soldering Iron Kit: A 60W iron with fine tips and a stand.
  The 0.6mm fine tip is critical for reaching small solder pads.
• Solder Wire: Thin, rosin-core solder (0.5mm-0.8mm diameter).
  Rosin core cleans the pad as you go, reducing the need for flux paste.
• Solder Wick: Copper braid to clean up excess solder.
  Essential for removing old solder from the pads before installing the new jack.
• Spudger or plastic pry tools: To open the laptop without scratching it.
  Plastic tools prevent damaging the chassis or internal ribbon cables.
• Small Phillips screwdrivers: Usually #0 or #1 size for laptop screws.
  Many HP screws have T6 Torx heads, but DC jack areas often use Phillips. Check your specific manual.
• Isopropyl Alcohol (90%+) and cotton swabs: For cleaning flux residue.
  Alcohol evaporates quickly, so you can power on the laptop immediately after drying.
• Magnifying Glasses: Optional, but helpful for inspecting fine solder joints.
  Even a simple phone camera zoom can help check for solder bridges.

Gather all tools before you open the laptop. Working in a clean, flat space prevents screws from falling into the chassis and causing shorts. Place screws in a small bowl or on a magnetic mat so you do not lose them. For the detail, see our notes on reasons thinkpads dominate the corporate market.

Find your exact HP model number

The HP Pavilion m3 convertible has many variations. The part number you need is printed on the bottom of the laptop, starting with “m3-u” (for USB-C models) or “m3-x” (for round DC models).

For the m3-u series, the DC jack is often integrated into a cable that plugs into a motherboard connector, not just soldered pins. This is a crucial distinction for your repair.

1. Flip the laptop over and look for the label with the Product number and Model name.
   For example, “HP ENVY x360 m3-u001dx” is a common model that uses a replaceable DC jack cable.
2. Search for “[Model Name] DC jack replacement” to confirm compatibility.
   Look for listings that explicitly mention your full model string, including the letter suffix (e.g., m3-u001dx).
3. Verify that the replacement part lists your specific model in the compatibility list.
   If the listing says “m3-u series,” it is likely compatible, but always double-check the pinout.
4. Count the pins on the motherboard connector.
   If your current jack has 5 pins and the new part has 6, they will not match. Do not buy until you know the pin count.

Disassemble the HP Pavilion m3 convertible

Because the m3 is a convertible, the screen assembly often blocks access to the mainboard. You may need to remove the keyboard bezel and the display hinges to reach the battery and the DC jack area. This is the most difficult part of the repair for beginners.

1. Power off the laptop and remove the battery if it is removable.
   If the battery is internal, disconnect the battery cable immediately after opening the chassis. This is your first safety step.
2. Remove the bottom screws and open the service panel.
   On m3 models, the mainboard is often under the display section, so you may need to remove the entire screen assembly. This involves unscrewing the hinges and disconnecting the video ribbon cable.
3. Disconnect the battery cable from the motherboard immediately after opening the chassis.
   Press the latch on the ZIF connector to release the cable. Do not just pull it out.
4. Locate the DC jack.
   It is usually on the side of the mainboard, connected to the motherboard by a short cable with a ZIF or board-to-board connector. Look for the circular opening where the charger plugs in.
5. Remove the old DC jack cable.
   If it is a ZIF connector, open the latch and slide the cable out. If it is soldered, you will need to remove the old jack before proceeding to the next section.

Replace the broken DC jack

If your jack is loose or pulled out, the solder pads on the motherboard may be damaged. If you are replacing the entire cable assembly, you simply unplug the old cable and plug in the new one. However, if the old jack was soldered directly to the board, you must remove it first. The other half of this decision is restoring power to hp models.

1. Disconnect the old DC jack cable from the motherboard connector.
   If the cable is integrated into the jack, this means you are replacing the whole unit. If the cable is separate, just unplug it.
2. Plug the new DC jack cable into the corresponding connector on the mainboard.
   Ensure the ZIF latch clicks into place. A loose connection here is the most common cause of failure after repair.
3. If your specific m3 model uses soldered pins (not a cable), apply fresh solder to the pads and press the new jack pins into place.
   Heat each pad for 2-3 seconds, then apply solder. Do not move the jack while the solder is liquid.
4. Use a solder wick to clean up any bridges between pins.
   Apply flux to the wick, lay it over the solder bridge, and heat with the iron. The wick wicks away the excess solder.
5. Inspect the joints.
   Each pin should have a shiny, concave solder joint. If the solder looks dull or flat, add a small amount more.

How to tell it worked: The new cable should be secure and not move when you gently tug on it. The connector on the board should be fully seated and not wobbly. If you see any solder bridges, clean them up now before reassembling.

Reassemble and test the connection

Put the laptop back together before plugging in the charger. This ensures you have not trapped a loose screw or cable inside the chassis. Take your time with this step; rushing leads to cracked plastic or pinched wires.

1. Reconnect the battery cable to the motherboard.
   Ensure the ZIF latch is fully closed. The battery should not be loose.
2. Reinstall the screen assembly and keyboard bezel if you removed them.
   Reconnect the video ribbon cable carefully. Do not bend the flat flex cable.
3. Screw the bottom panel back on.
   Tighten screws hand-tight. Do not use a power driver, or you will strip the screws.
4. Plug in the charger and turn on the laptop.
   Wait for the power light to come on. If it stays off, check the connector one more time.

If the power light comes on and the battery starts charging, the repair is successful. If not, re-open the laptop and check that the DC jack connector is fully seated on the mainboard. Listen for a click when you plug in the charger; if it is loose, the port is not aligned.

Common mistakes and how to avoid them

• Stripping the screws → Use the correct size driver and apply firm, steady pressure. If the head is already stripped, use a rubber band inside the screw head for grip.
• Shorting the motherboard → Work over a non-metallic surface and keep tools away from the board when the battery is connected. Always disconnect the battery first.
• Using the wrong DC jack → Double-check the model number. A jack with the wrong pinout will not charge and may damage the board. Verify the pin count against your motherboard.
• Skipping flux cleaning → Residue can attract moisture and cause corrosion. Wipe the area with isopropyl alcohol after soldering. Let it dry completely before powering on.
• Overheating the solder pads → Do not hold the iron on one pad for more than 5 seconds. Excessive heat can lift the pad off the board, making the repair impossible.

The bottom line

Frequently asked questions