USB Mouse Repaired For Clicking Ok But Cursor Is Not Moving
Long back I repaired this mouse by replacing damaged retractable USB cord to normal USB Cord.
Now again received for repair stated problem; it was dropped down on floor & stopped working. So for testing I connected it on my setup, I found both the switches are clicking & working fine but cursor is not moving on the screen of monitor. I also found Mouse is making some noise when shake.
So now time for internal inspection. I opened the Mouse to find out what type of broken part is moving inside?
I found one electrolytic capacitor is out of the circuit. Does this part cause above said problem symptom? I do not think so.
So I started to find out from which location this capacitor is came off. I did not found the location on top PCB so I opened the top PCB to check other circuit underneath.
Not found any sign of part removed from that circuit also. Actually I am looking for the sign of electrolytic capacitor marking on the PCB. Generally, mark is like this.
Again I checked the top circuit solder side if I found any sign.
Found this solder joints not having any component on other side.
I removed top PCB stickers & I found the location ….
(Some time things are not as per our imagination) …. I soldered the capacitor back to his location.
After soldering the capacitor back to its location, I connected the mouse again on my setup for testing but it not resolved the problem ….
So I started checking all the cables one by one. Everything is OK except Laser diode.
In normal mouse you will have the red LED sensor light on bottom side so when you connect the mouse to computer this LED will light up. But this mouse is having LASER DIODE which is not illuminate.
Generally, this diode does not go bad but this is main part who does movement of cursor on the screen. Checked wires of diode looks intact.
So here visual inspection will not work. Hence I checked USB Cable continuity again but it is showing OK. Now I concentrated to the LASER DIODE again.
I removed the LASER DIODE cable socket from the PCB.
At the time of removing cable, I feels wires are giving some different feeling on my finger like I am holding a thread, it does not have strength like wire soldered on something will remain in the same state. But this wires are moving like thread….
So I decide to remove & resolder the wires, I removed heat shrink sleeve of one wire & found that wire is hanging and came out of solder joint same way removed other wire sleeve found same problem now I found the culprit. Wires are holding place because of heat shrink tube but internally it was disconnected.
So resoldered both the wires by applying new heat shrink tube.
After soldering the wires on the laser diode I connected the mouse on my setup again for testing & now this time cursor starts moving.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles on DOB LED Circuit Replaced
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Waleed Rishmawi
May 25, 2024 at 2:04 pm
thanks for sharing this repair information. i have not opened one before expecpt for cleaning and stuff like that but did not repair one before because they are very cheap to buy in my country. any ways, thanks for sharing and have a blessed day
Yogesh Panchal
May 25, 2024 at 11:00 pm
Thanks!Waleed
Sometimes some things emotionally connected, so money does not matter,that is why customer bring the things for repair,on discussion i come to know that customer is using this mouse since more than 10 years...
Parasuraman S
May 25, 2024 at 2:55 pm
Very intricate work done on a mouse just to derive satisfaction of having fixed it, I think! Well done! The heat shrinking sleeves can become a bother sometimes. It is difficult to assume too!
Yogesh Panchal
May 25, 2024 at 11:03 pm
Yes sir,
The satisfaction of being able to fulfill someone's expectations.
Albert van Bemmelen
May 25, 2024 at 4:54 pm
Nice repair article that shows that everything is worth repairing! Even when it needed a second repair after it accidentally was dropped on to the floor.
Yogesh Panchal
May 25, 2024 at 11:04 pm
Indeed ,Thank you! Albert
Imoudu.O
May 26, 2024 at 4:55 am
I did mouse repair once when l started electronics repair work four years back, even then i did not know what some of internal components were.Thanks for sharing.
Yogesh Panchal
May 26, 2024 at 3:15 pm
Imoudu.O,
You will get some idea about Mouse from our previous articles.
https://jestineyong.com/category/mouse-repair-2/
Henrique J. G. Ulbrich
May 28, 2024 at 12:31 am
Very good, Yogesh. Thanks for sharing.
Your present article remembered me a contribution I posted some years ago, with similar problems. Just 5 problems in an unique maintenance! I invite all of you to review it at https://jestineyong.com/a-multi-trouble-computer-mouse-repaired/
Yogesh Panchal
May 28, 2024 at 2:48 pm
Thanks!Henrique
It was a nice in depth article shared by you, its been almost 9 years still the tips are contributing for newbies in this field,thanks again for sharing & remind memories.