Hannstar Hn198 Monitor Main And Power Board Capacitors Replacement Repair Guide

Difficulty

Difficult

Steps

Time Required

                          30 minutes

Sections

Main and power board capacitors
5 steps

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Introduction

What you need

Step 1

              Opening the monitor

Before you begin, be sure to unplug the device from the outlet.
WARNING: There are capacitors inside that can pose a serious shock hazard. Be very careful not to touch any exposed leads on the power board.
First of all, you need to unscrew the 4 screws holding the stand. After that the 4 screws holding the back panel, they are located in the corners of the device (only the top ones are shown in the picture).
Second, you need to pry the plastic grey basel on the front of the monitor. There are several clips holding everything together.
Also after removing the basel it might be a good idea to give the screen a good clean.

Before you begin, be sure to unplug the device from the outlet.

WARNING: There are capacitors inside that can pose a serious shock hazard. Be very careful not to touch any exposed leads on the power board.

First of all, you need to unscrew the 4 screws holding the stand. After that the 4 screws holding the back panel, they are located in the corners of the device (only the top ones are shown in the picture).

Second, you need to pry the plastic grey basel on the front of the monitor. There are several clips holding everything together.

Also after removing the basel it might be a good idea to give the screen a good clean.

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Step 2

              Reaching the power and main boards.

First of all, disconnect all the connectors (5 marked with arrows.)
Second, remove the 4 acrews holding the bracket, marked with blue. (Also there might be some aluminum tape holding the covers, just rip it off, you wont need it for reassembly)
Third, remove the 4 screws covering the boards, marked with red.

First of all, disconnect all the connectors (5 marked with arrows.)

Second, remove the 4 acrews holding the bracket, marked with blue. (Also there might be some aluminum tape holding the covers, just rip it off, you wont need it for reassembly)

Third, remove the 4 screws covering the boards, marked with red.

Step 3

              Checking the power board

After opening the cover, remove the 4 screws holding the power board and check for busted capacitors. (You might need to disconnect the connector, it might be easier for you to work)
In my case I had to change the 7 capacitors marked in red (the picture is after the change).
You can always put higher voltage (V) rated capacitors (if you have the space), but dont change the farad (F) rating.

After opening the cover, remove the 4 screws holding the power board and check for busted capacitors. (You might need to disconnect the connector, it might be easier for you to work)

In my case I had to change the 7 capacitors marked in red (the picture is after the change).

You can always put higher voltage (V) rated capacitors (if you have the space), but dont change the farad (F) rating.

Step 4

              Checking the main board

Remove the 3 screws holding the main board and disconnect the 2 connectors
Unscrew the monitor connector stands so you can remove the board.
Flip the board and inspect the capacitors. In my case they were all fine (except the one marked in blue) and the monitor was working after I changed the capacitors on the power board, but yours may be different.

Remove the 3 screws holding the main board and disconnect the 2 connectors

Unscrew the monitor connector stands so you can remove the board.

Flip the board and inspect the capacitors. In my case they were all fine (except the one marked in blue) and the monitor was working after I changed the capacitors on the power board, but yours may be different.

Step 5

              Final

After putting everything back together, the monitor was working once again. I tested both display ports and the AUX port.

Thank you for following my guide and I hope it helped you!

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

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                                                                                      2 other people completed this guide.

Author

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                    Simeon Brankov

Member since: 11/08/2020

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Member-Contributed Guide

Introduction

What you need