Laptop - motherboard problems

Winnetou

Honorable
Oct 20, 2013
10
0
10,510
Hey guys.

I have some serious problems for a long time.

Setup.
- Asus K53SV, i7 2630qm, GT 540m
- Dell 2312 full hd monitor
- Logitech M185 wireless mouse
- Logitech K120 wired keyboard

Problem 1.
Any mouses I connect to my laptop, they dont work normal. Sometimes I can feel some delay, lag or the pointer is inaccurate. This state isnt constant, sometimes it seems to be ok, sometimes it doesnt.
I tried changing batteries in my wireless mouse. I tried with my wired mouse. I tried without my external monitor. I tried installing newer/older drivers (intel hd, nvidia, realtek sound, realtek lan, atheros wlan) and reinstalling windows 7 several times. Nothing helped.

Problem 2.
Buzzing sound in my earphones. Sometimes it does it when I move the mouse, or when I move the screen (scrolling pages). Right now I am using a wired mouse and it produces this buzzing sound constantly, and its even stronger when I actually move the mouse. I tested it with 3-4 earphones/headsets.

Tests.
I tested DPC Latency, it is usually 400ps with DPC Latency checker. Sometimes the spikes go up to 3000 or even higher.
I read about usb 3.0 interference and wifi interference. Tried disabling both devices in device manager.

I made two videos with my wireless mouse some weeks ago.

https://www.dropbox.com/s/p9wspvrxzhqku7l/iw5sp%202013-10-20%2010-39-42-63.mpg
In this video im trying to move the moues left-right, the same distance, but the camera randomly goes over sometimes.

https://www.dropbox.com/s/op8yg0toer32vl8/iw5sp%202013-10-20%2010-40-01-66.mpg
In this video im trying to aim the two pillars. It was very hard with that accuracy.

Conclusion.
In my opinion, my laptop needs a motherboard repair/swap. The usb system is probably damaged, that could cause the mouse lag. The buzzing sound must be the sound card.
This laptop still has some weeks warranty. I already sent it to service a month ago, they did nothing but swapped the touch pad panel and the top case.

What should I do?

 

Winnetou

Honorable
Oct 20, 2013
10
0
10,510

This laptop still has some weeks warranty. I already sent it to service a month ago, they did nothing but swapped the touch pad panel and the top case.