How to debug a laptop keyboard hardware problem?

How can I debug a laptop keyboard hardware problem? Basically, how do I know what could be or what is exactly broken?

For example, I have a problem and I might like to solve it. What I do know is that when it broke, I was there. At first I only thought that "v" had broken, later it turned out, at least for me, it would make sense that in the keyboard matrix, an entire "line" did not work .

So I can no longer press the following keys at the same time without one of them being ghost, if I could not list them all:

"q3t", "ur", "ot", "cb" (not sure for cb although I think it was possible before), "wrz"

when you hold SHIFT, "B" does not work

holding right alt or "alt gr" 4 and 5 is not their combination does not work.

so yes that's it

Now here's something that is starting to get into a strange situation. So I know there are circuits and stuff and it doesn't make sense to me that a circuit like a line __________ just stopped like that _______ / __________ I don't think because that would make "v" not work at all. Because sometimes the "v" works and it is not because of the "strong pressure".

Sometimes there is like a "wave", where a bunch of "v" starts to appear which goes like this in entering text:



So when this happens, if I press any other key as an example on the numeric keypad or even F1. If I do that, the "v" stops "spamming". But sometimes it also stops on its own, without me doing anything on the keyboard.

What I was able to try is that when this "wave" appears if I press a key on the "on-screen keyboard", it does not stop the "spam". I'm not able to test what's going on with an external keyboard, but I guess it's a laptop keyboard hardware problem somewhere, I don't know where.

Now here's the weird part, sometimes after the wave or, well there are times when everything works again, the "v" and all combinations would work again, is that the weird part?

Remember when I mentioned the circuit line, if it is broken? There is now a way it won't be interrupted, something else has to happen, I don't know what. I don't understand if the cable starts to run inside my computer or something, it just doesn't make sense to me.

I am able to make a "wave" appear when I try to press these non-functional combinations "q3t" WHAT is not guaranteed. Sometimes just a "v" appears when I do this.

Then when I use "v" it works for a while and then it doesn't work anymore, it means it goes back to the state where when I press it it does nothing and when it doesn't work everything the other combos don't work as well, like "q3t".

So yes, what exactly is going on? How is it possible that "v" sometimes works or not? How can I debug this? Because I don't know if it's worth trying to open it and then what, unplug and plug back in?

The model I have is an ASUS ROG GL752VW. The keyboard layout is essentially a 96% keyboard.

display – Windows 10 laptop does not detect legacy monitor

Well, I finally bite the bullet and work from home. The fact is that the toy laptop that my company gives me may be enough for a working day, but it is just too small to run for several days. So, I dug up an old monitor inherited from 15 years ago and tried to hook it up. The laptop does not detect it at all. Just to be clear, it does do not see a second screen that he doesn't recognize. It just doesn't detect the monitor at all. I have found a few websites on the internet that give solutions, but they all involve downloading drivers. I can tell you with certainty that my business will not allow me to do this. So, I grab the straws here. Anyone have a solution that doesn't involve downloading software? The laptop is a Dell, Windows 10. The monitor is an Innovision MAG, which works with a VGA cable. (Poor thing, it was really good at the time). I connect it to the laptop via a docking station with a VGA port.

display – System Preferences keep opening on my broken laptop screen even if everything else works fine on my external monitor?

My Macbook Pro's screen is broken so I can only see the blurred edges and can't use it at all. I have an external monitor organized with the menu bar and all the other apps that work fine, but every time I go into system preferences it tries to open on the laptop screen . I can't find a way to get this window back and even my display preferences are in the same menu that I can't see. πŸ˜”

I need my laptop to be open for keyboard and mouse, so I'm lost.

Windows 10 – Keep Intel HD Graphic CP on a Laptop with Hyper-V and a Dedicated GeForce GPU

On a Windows 10 laptop with a GeForce GPU (750M) and an integrated Intel graphics card, I enabled Hyper-V.
Once I do, after rebooting, I notice that Intel HD Graphic Control Panel is not launched, cannot be launched and is bypassed in some way or another other.
This leads to a bad UX where everything is stuffy, delays and animations like minimizing / maximizing windows are not at all fluid.

All the drivers are up to date, Hyper-V works fine, everything is fine except the feeling that something is wrong because it is late.
As soon as I deactivate Hyper-V, restarted twice, Intel HD Graphic CP is back, and nothing is left behind.

Is there a way to keep the Intel graphics processor integrated with Hyper-V and only use GeForce when needed? or any other fix?

My Windows 10 Asus laptop won't start or reset. Not enough disk space

My asus rog laptop won't boot, just goes to the blue screen with the many ways to fix it. I have tried everything, including hard reset and safe mode, and I still get the same error: not enough disk space. I'm stuck in there. Help?

performance – Laptop significantly slows white / plugged-in charge

(TL; DR is at the end of the message)

Good morning all.

My current laptop is an HP 15-r218nv. I know it's not the best laptop for gaming, but it gets the job done. I bought it 3 years ago and it worked great all this time. Last year, the laptop started to overheat, and because I didn't have the money to clean it, and I wasn't confident enough to clean it up. Open and clean it myself, I removed the battery, the simplest and most effective way to lower the heat and not lose a lot of performance. I continued to play games as usual, and about 4 months ago there was a storm in my house, and the storm fried the power brick. I recently received another laptop, and the new charger for this laptop could fit and charge my old one, so I decided to reset the old one and put it to update to Windows 10 version 1903 (I had Windows 10 version 14XX).

Because I have a charger, I have to reconnect the battery from the old laptop. I did it and I downloaded some games again. I started playing games and noticed something strange while playing CS: GO. I played CS: GO without loading the laptop, and I had excellent fps, around 100 fps. The battery has reached a low percentage, and I plugged the charger into the laptop, and I immediately noticed a drop in fps to 20 fps, also with a drop in fps. ; CPU and GPU usage, from ~ 80% to ~ 35%, and ~ 100% to ~ 50% respectively.

I thought the drop in fps was due to the fact that the laptop had changed some options and settings due to the power plan / battery, so I waited a few seconds , but the fps did not rebound. When I noticed that the fps was not going to go up, I unplugged the laptop to do a test and see what the fps result would be. My fps returned to 100 fps. The next day, I decided to run CS: GO again, and noticed low fps again. I tried a different method of the problem, to see if it would solve it.

My laptop is equipped with an Intel Core i7-5500U processor and an Nvidia GeForce 820M. I use the integrated graphics because they are more responsive and faster than the Nvidia GPU.
In the nvidia control panel, I can choose the GPU I want each program to use, and I thought I forgot to switch the preferred GPU for CS: GO to the integrated graphics, but that was not the case. I thought the control panel was buggy, so I disabled the Nvidia GPU via the device manager. The game was still shifted.

I reactivated the Nvidia GPU and went to Google to find answers to my problem. The supposed solutions that I found were:
It can be a BIOS setting. That may be the reason, and I say maybe, because I don't see any settings that are causing this, but my BIOS has a very limited amount of settings that I can change.
A power / battery plan option is down, which is not
Maybe in the control panel of the Intel iGPU, I have things misconfigured, which is also not the case

None of these solutions worked and I don't know what to do next. If anyone has an idea of ​​the problem, I would be grateful if you would help me.

My laptop's CPU and GPU usage drops dramatically when plugged in, becoming almost halved. Changing the BIOS does not help, the power / battery plan is correctly configured and the configuration from the graphics control panel is correctly defined. I don't know what to do next.

Best laptop screen

Top best touch screen laptop

Here is the best touchscreen laptop techcare – Da Nang's laptop wants to share with you. These will be great choices for users who love these 2 in 1 laptops.

HP Specter x360 (13 inch)
Best Touchscreen Laptop 2019 The HP Specter x360 has a 13.3-inch screen and 1080p resolution. Brings an extremely vivid image and you can fold it to use as a tablet. Draw very well when using the included HP Active Pen so that users have no problem creating their masterpieces with this awesome machine. With the display, the HP Specter x360 Notebook PC offers all-day battery life and an excellent keyboard. If you want to have a larger canvas to work on, get this laptop right away!
HP Specter x360 Laptop Main Specifications – Processor: Intel Core i7 | GPU: Intel UHD 620 | RAM: 8 GB / 16 GB | Storage: 256 GB / 512 GB SSD | Display: 15.6 inch, 1080 or 4K | Dimensions: 12.2 x 8.6 x 0.6 inches | Weight: 2.8 pounds.
Microsoft Surface Pro 6
Microsoft's Surface Pro 6 is better removable and has a screen size of 12.3 inches with a resolution of 2736 x 1824 pixels. Making its display clear and colorful is a big reason why it is so popular. Plus, since the device can be removed, the Surface Pro 6 will be a great companion if you want to get your work done even on the go.
Main specifications of Microsoft Surface Pro 6 – Screen: 12.3 inches, 2736 x 1824 pixels | CPU: Intel Core i7 maximum | GPU: Intel UHD 620 | RAM: 8 GB, 16 GB | Storage: up to 1 TB SSD | Battery life: 9h20 | Size / Weight: 11.5 x 7.9 x 0.3 inches / 2.4 pounds.
Lenovo ThinkPad X1 Carbon
With techcare – selling old imported Da Nang Lenovo Thinkpad X1 Carbon laptops, Lenovo has taken everything users love about their ThinkPad laptops – durable chassis with comfortable keyboard and security features. Extremely useful password. Finally, this laptop model has been tested MIL-STD-810G with a thickness of 0.6 inches and weighs only 2.5 pounds. Business users will appreciate the laptop's built-in fingerprint sensor and should choose to use the optional infrared camera.
Main Specifications of Lenovo Thinkpad X1 Carbon Laptop – Screen: 14 inch, 1080p or 2560 x 1440 pixels | Processor: Max Intel Core i7-8650U | GPU: Intel UHD 620 | RAM: up to 16 GB | Storage: up to 1 TB SSD | Battery life: 11:01 (1080p), 10:28 (1440p) | Size / Weight: 12.7 x 8.5 x 0.6 inches / 2.5 pounds
Dell XPS 13
Dell's XPS 13 touchscreen laptop tops our top ranking for years and the new model is no different. Yes, the Dell XPS 13 laptop has one of the most beautiful designs on the market, but users will be very busy with an extremely vivid, detailed 4K touch screen so that they can even pay attention to the frame. Specifically, this 4K model has a super sensitive, non-touch 1080p touch screen.

The Dell brand has made extremely significant improvements to this 2019 model. The device is equipped with a new Whiskey Lake processor which offers very good performance, this will be a real advantage for professional users who use software. which uses a lot of CPU.
Key Features of Dell XPS 13 Laptop – Screen: 13.3 inch, 1080p or 4K | CPU: Intel Core i7 maximum | GPU: Intel UHD 620 | RAM: up to 16 GB | Storage: up to 1 TB SSD | Battery life: 7h50 (4K) | Size / Weight: 11.9 x 7.8 x 0.5 inches / 2.7 pounds.
Come to Da Nang Techcare old laptop buying and selling system for advice and immediately choose a laptop that best suits your needs!

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What laptop configuration to buy for school and office


I plan to buy a laptop for my college student and at the same time I want to use it for office work. Can I know the configuration for goal 2 above? Purely for school and office

Thank you

Which older laptop is better?


I currently have a very old laptop and I just bought a newer laptop for $ 50 (firewall from a wealthy friend who leaves the country as soon as possible).

I don't know which is better. Can you help me? (Should I switch to the new laptop? Or should I just use parts like the memory and wifi chip from the new laptop and install them on my old existing laptop?)

(My laptop is usually plugged in and turned on 24/7. I use the battery at most a few hours a week (going from room to room in my house, or sometimes to friends for dinner where I may need to work on something emergency, etc.). I use the laptop to manage my hosting business, by browsing Internet, email, etc. No games or anything like that.)


Thinkpad T520 (model: 4239-CTO) – Date of manufacture: 2007

Processor: 2.50 GHz Intel Core i5 2520M (512 KB L2 cache / 3 GB L3 cache)
Memory: 6.00 GB DDR3 dual-channel memory at 664 MHz (9-9-9-24)
Display: 15.6 "LCD 1366×768
Graphics: Intel HD Graphics 3000 (Lenovo)
WLAN / Bluetooth: Intel Centrino Ultimate-N 6300
Storage: 128 GB SSD


Thinkpad E565 (model: 20EY000CUS) – Date of manufacture: 2015

Processor: AMD A10-8700P (2 GB L2 cache)
Memory: 12 GB (4 GB x 1 + 8 GB x 1) DDR3 1600 Mhz
Display: 15.6 "HD (1366×768)
Graphics: AMD Radeon R6 M340DX 2GB
WLAN / Bluetooth: BCM43162 ac, 1×1 + BT4.0
Storage: 128 GB SSD

Here is a link to compare the two CPUs, but I don't really understand what it all means in "real" speed and which laptop would be best for me:…20M_(PGA).html

replacement – Import a function from another laptop by changing a setting

I am trying to import a function obtained from another laptop into my current laptop. In addition to importing it, I need to replace all x with (x + 40).

Here is an example:

Book 1:


The following should appear on notebook 2:


Could someone help me with that?

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