Dymo Labelwriter 450 Motherboard Replacement Repair Guide

Difficulty

Moderate

Steps

3

Time Required

                          5 minutes            

Sections

2

• Back Plate
• 2 steps
• Motherboard
• 1 step

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0

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Introduction

What you need

Step 1

              Back Plate               

• Make sure the device is unplugged. Then, turn over the device so that the label is readable.
• Remove the two 15.7mm screws on the top of the device first, and then the two 26.5mm screws on the bottom (they are in the smaller holes and larger holes respectively) using a Phillips #1 screwdriver.
• You need a spudger to orient the bottom screws so that they can be removed.

Make sure the device is unplugged. Then, turn over the device so that the label is readable.

Remove the two 15.7mm screws on the top of the device first, and then the two 26.5mm screws on the bottom (they are in the smaller holes and larger holes respectively) using a Phillips #1 screwdriver.

You need a spudger to orient the bottom screws so that they can be removed.

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Step 2

• Once the Back Plate has been unscrewed, you will see the components from the top of the device plugged into the motherboard. You will only have 1-2 inches of clearance to unplug the components from the motherboard.
• There are four components to unplug: the power cable connector, the two small no-fuss ribbon cable connectors, and the large no-fuss ribbon cable connector. The order does not matter.
• This device has a blade located within the front panel. When handling the device, be careful not to touch the blade.

Once the Back Plate has been unscrewed, you will see the components from the top of the device plugged into the motherboard. You will only have 1-2 inches of clearance to unplug the components from the motherboard.

There are four components to unplug: the power cable connector, the two small no-fuss ribbon cable connectors, and the large no-fuss ribbon cable connector. The order does not matter.

This device has a blade located within the front panel. When handling the device, be careful not to touch the blade.

Step 3

              Motherboard               

• Unscrew the three 9.8mm screws from the motherboard, then pull out the gray spacers that are between the screws and the motherboard.

Unscrew the three 9.8mm screws from the motherboard, then pull out the gray spacers that are between the screws and the motherboard.

To reassemble your device, follow these instructions in reverse order.

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                    Jared Finkel                     

Member since: 10/09/2018

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                       USF Tampa, Team S1-G4, Leahy Fall 2018                        

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esh.fire - Nov 27, 2019

Reply

My 450 turbo will not turn on. Power light does not light. Power supply lamp is lite and plug provides 24V DC power measure by volt ohm meter. Is this fixable? Do you think the motherboard went bad?

Only print about 100 labels per year and have had the unit for 5+ years.

Donna - Feb 21, 2021

Reply

I’ve had the same issue - very little use from new, it just stopped working , now when plugged in there’s no blue light, just a repetitive sound but nothing else happens - could a faulty motherboard cause this?

Werner Jakobus - Mar 11, 2021

Reply

In our unit the step-down converter, make the incoming 24 Volt to 5 Volt, are in malfunction an kill other components.

On the mainboard, the Q3 has make a shorting on the incoming 24 V powerline. Not shure if the PWM Controller is still OK (IC with 8 pin’s).

The reason for the malfunction is the possible of a shorted capacitor.. Bad circuit for the power!