Difficulty

Moderate

Steps

8

Time Required

                          30 minutes

Sections

1

  • Optical Unit (fixiing Wobbling Mouse Pointer)
  • 8 steps

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  • BackAnker Vertical Mouse (98ANWVM-BA)

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Introduction

What you need

Step 1

              Open the cover
  • Remove 3 black adhesives and screws underneath.
  • Lift top cover carefully
  • disconnect the white connector by the help of a screw driver or by finger to remove the cover completely

Remove 3 black adhesives and screws underneath.

Lift top cover carefully

disconnect the white connector by the help of a screw driver or by finger to remove the cover completely

1024

Step 2

  • Remove 2 screws to lift-up the two metal weights

Remove 2 screws to lift-up the two metal weights

Step 3

              Removing the mainboard
  • carefully remove the black adhesive tape
  • remove 2 screws
  • lift up the entire mainboard and take care of the two black fixing points
  • you have now the mainboard and the optical unit separated

carefully remove the black adhesive tape

remove 2 screws

lift up the entire mainboard and take care of the two black fixing points

you have now the mainboard and the optical unit separated

Step 4

              reason of malfunction
  • the reason for my problems where that the transparent optical unit has too much space and wobbles around while shaking the mouse which results in unwanted movement of the mouse pointer
  • therefore I fixed the optical unit by double-sided adhesive
  • best way to do so is to prepare 4 stripes of THIN double-sided adhesive and stick it around the 4 sides of the window, where afterwards the optical unit is put back to its place.

the reason for my problems where that the transparent optical unit has too much space and wobbles around while shaking the mouse which results in unwanted movement of the mouse pointer

therefore I fixed the optical unit by double-sided adhesive

best way to do so is to prepare 4 stripes of THIN double-sided adhesive and stick it around the 4 sides of the window, where afterwards the optical unit is put back to its place.

Step 5

              Fixing the optical unit (up-side-down)
  • hold the mainboard between your finger as shown in the image
  • place the transparent optical unit as shown in the image
  • take care, that the unit is properly aligned horizontally
  • This step ensures, that the opical unit is properly aligned to the black counterpart onboard of the chip at the mainboard
  • while continue holding the mainboard, take the black BOTTOM cover and place it up-side-down to the mainboard, such that …
  • 1.) the optical unit is placed to the corresponding window of the cover and that …
  • 2.) the black fixing points and the two screw-supporting points properly click into the mainboard holes
  • During this 2 steps ensure, that the optical unit stays in place in regard to the black counterpart on the mainboard. If all parts are properly placed, the optical unit should stick to the black cover by means of the double-sided adhesive tape. You can support this by carefully pressing the transparent unit to the black cover.

hold the mainboard between your finger as shown in the image

place the transparent optical unit as shown in the image

take care, that the unit is properly aligned horizontally

This step ensures, that the opical unit is properly aligned to the black counterpart onboard of the chip at the mainboard

while continue holding the mainboard, take the black BOTTOM cover and place it up-side-down to the mainboard, such that …

1.) the optical unit is placed to the corresponding window of the cover and that …

2.) the black fixing points and the two screw-supporting points properly click into the mainboard holes

During this 2 steps ensure, that the optical unit stays in place in regard to the black counterpart on the mainboard. If all parts are properly placed, the optical unit should stick to the black cover by means of the double-sided adhesive tape. You can support this by carefully pressing the transparent unit to the black cover.

Step 6

              Re-assembling + functioning test
  • You can now directly place back the screws…
  • …or again remove the mainboard and ensure that the optical unit stays at the place and is fixed properly.
  • After having fixed the mainboard I did a functional test by plugging in the USB calbe to a PC and text the normal movement of the mouse pointer
  • I still noticed a “wobbling” of the mouse pointer while shaking the mouse, which I could point to the bad fixed red LED –> see next step

You can now directly place back the screws…

…or again remove the mainboard and ensure that the optical unit stays at the place and is fixed properly.

After having fixed the mainboard I did a functional test by plugging in the USB calbe to a PC and text the normal movement of the mouse pointer

I still noticed a “wobbling” of the mouse pointer while shaking the mouse, which I could point to the bad fixed red LED –> see next step

Step 7

              Fixing the red LED - 2nd reason for malfunction
  • the red LED has some space / gap between the black cover and the mainboard (red circle) and therefore can move.
  • place some double-sided tape inside the gap on both side (white in the image)
  • gently press down the black cover to fix close the gap
  • to let the black cover let stay sticked to the mainboard/tape I placed some black, strong adhesive tape ontop of the black cover of the red LED to permanently press it down.
  • I wanted to be save and fixed the optical unit and the red LED with some more black tape to keep in place and avoid any movement.
  • I made again a functional test by plugging in the USB and shaked the mouse. No mouse pointer movement was present anymore –> SUCCESS!

the red LED has some space / gap between the black cover and the mainboard (red circle) and therefore can move.

place some double-sided tape inside the gap on both side (white in the image)

gently press down the black cover to fix close the gap

to let the black cover let stay sticked to the mainboard/tape I placed some black, strong adhesive tape ontop of the black cover of the red LED to permanently press it down.

I wanted to be save and fixed the optical unit and the red LED with some more black tape to keep in place and avoid any movement.

I made again a functional test by plugging in the USB and shaked the mouse. No mouse pointer movement was present anymore –> SUCCESS!

Step 8

              Finish re-assemble
  • put back the metal weights and screws
  • plug-in again the connector
  • put back the top cover
  • tighten again the screews and place back the sliding tapes
  • ENYOU THE WORKING DEVICE!

put back the metal weights and screws

plug-in again the connector

put back the top cover

tighten again the screews and place back the sliding tapes

ENYOU THE WORKING DEVICE!

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                                                                                      6 other people completed this guide.

Author

                                      with 2 other contributors 


                    Robert

Member since: 01/16/2014

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Albert - May 27, 2018

Reply

i have a slightly newer model of this mouse. the cursor was making a repeated square motion. Seems like the photodiode picked up the blinking blue LED, which I think is only an indicator for the user. The actual functional LED seems to be infrared rather than red in the new model, and placed closer to the blue LED. I fixed my problem by covering the LED more completely with opaque tape. Not sure if my explanation makes sense? This is what I deduced, with the help of the above post and some trial and error, seeing that the cursor movement correlated with the blue light blinking and that the behavior was prevented by blocking the blue light with my fingertip. Also broke the battery leads in the process and had to resolder the through-hole connections.

abdur rahman - Mar 21, 2019

Reply

How do I disassemble the top part which has the buttons and scroll wheel.

Robert - Mar 21, 2019

To disassemble the button-unit you have to follow complete step 1 and disconnect the grey cable.

If you look into the top button carrying unit you see a clip (or two?) at the side opposite to the scroll wheel which you can carefully click out with a finger or a screw driver. Then only the buttons itself should lift up alittle bit and you can push it a little bit out. At the tip of the button unit there are just two hooks wich you can carefully pull out of the holes. Then you should have removed the buttons and can see the red button-devices underneath.

Did this help?

With this procedure I regularly adjust the pressure point of the left mouse button as it sometimes looses connection to the button-device. So I glue some stuff (for now very thin metal of <1x1mm² worked quite well) on the black cross-shaped “spike”.

Tug - Oct 30, 2019

Reply

Hi, I would like to write the guide for the upper part disassembly (I changed the scrollwheel).

Do you mind me reusing the first 2 photos of your first step ? I didn’t take photos of this part.

Or even better, make the first step a separate guide so I can use it as a prerequisite ?

Brian - Feb 29, 2020

Reply