mouse x7 xl-747h randomly stop responding

[pharaon]

hello every one i'm having an issue with my mouse mouse x7 xl-747h i notice that the mouse stop responding randomly for seconds or minutes then work again. i found out that when it stop responding the reason is the laser light is not working what cause this issue and how to fix it

 

[Alec_t]

Is that a wireless mouse or a wired one?

 

[pharaon]

Is that a wireless mouse or a wired one?

wired mouse

 

[Alec_t]

I would guess there's a bad connection somewhere inside the mouse, or in the wiring to the mouse.

 

[pharaon]

that was right guess. i fixed it thanks

I would guess there's a bad connection somewhere inside the mouse, or in the wiring to the mouse.

 

[Alec_t]

Good to know it's working.

 

[pharaon]

unfortunately the issue back again
i rewired all the wires yesterday and now same issue mouse light is on but no laser light so cursor freeze
and i'm pretty sure the wires after being solder won't move cause i fixed all with glue
so what else would be the issue

 

[pharaon]

i rechecked all the wires connection and all is fine but the same issue still exist

 

[Alec_t]

Have you tried a different mouse in the same port?

 

[pharaon]

yes and it work fine and tried the mouse on different ports and same issue
the mouse light and all the button are working but no leaser beam as before
it worked fine today but then again stop laser beam although all buttons works and mouse lighting fine

 

[pharaon]

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i found the issue
when the voltage on the laser led diode is 1.9V the mouse pointer work fine
when it drop to 1.2V the mouse pointer stop moving

so what cause the voltage to suddenly drop from 1.9V to 1.2V?

and the led diode's wires aren't connected to the small capacitor

 

[Alec_t]

Can you post a sharply-focussed pic of the under-side of that board?

 

[pharaon]

 

[Alec_t]

I have marked up your pic (below) in yellow 11 areas where I think there are small solder blobs, poor joint soldering or corrosion, any of which might cause a problem.

 

[pharaon]

i re soldier all the joints. but still the voltage at the laser diode is 1.3 V not 1.9v to make it operate
so what do you think cause such drop in voltage ?

 

[Martaine2005]

Is that glue holding the wires to the board?.
Perhaps it’s gone slightly conductive and shorting?.
That would certainly cause the voltage to drop fast.
Scrape it off and see.

 

[pharaon]

Is that glue holding the wires to the board?.
Perhaps it’s gone slightly conductive and shorting?.
That would certainly cause the voltage to drop fast.
Scrape it off and see.

which wire and glue do you mean?

 

[Martaine2005]

Is that glue holding the wires to the board?.
Perhaps it’s gone slightly conductive and shorting?.
That would certainly cause the voltage to drop fast.
Scrape it off and see.

 

[Martaine2005]

The red and black wires.

 

[bertus]

Hello,

I think that @Martaine2005 means the brown stuf next to C11, where the red and black wire stick out.

Bertus