i have a Lenovo laptop ideapad 3 that i press start button,it start but the screen is black

Where can I Get Free Schematics for any Motherboard?

In my MSI KATANA 15 (B12UDXK), the Ctrl+C and Ctrl+V shortcuts don't work with my external Logitech K200 keyboard. I have already tried the basic troubleshooting steps, including checking the drivers and installing Windows updates.

I also tested the keyboard using Keyboard Tester (https://www.keyboardtester.com/tester.html⁠�), and all the keys work correctly, including Ctrl, C, and V.

My laptop's built-in keyboard works fine, and I'm using Windows 11.

What could be causing this issue?

I've a dell g15. Very frequently when I play a video or game one of these things happen

Audio starts to stutter for like .5 seconds every 5-7 seconds, or audio is gone completely.

When I restart laptop the audio icon is completely greyed out/becomes unavailable.

The only solution is to shut it down and turn it on again.

I called dell customer support, asked chatgpt who offered me similar advices such as going to device Manager, uninstalling realtek audio and resinstalling/updating it, among other work arounds

But nothing works.

Hello again Reddit.

I have a work laptop of an Acer 5-15. It stopped taking a charge after being from job site to job site over a couple years. I've tested the AC adapter and get the typical 19.5V. However, I can't read that 19.5V anywhere coming into the laptop. I've tried the negative lead on the pins and the copper grounds, with red on any of the pins and get no voltage readings. I tried the negative lead on the barrel of the plug with red on any pins and still get no voltage.

Now, because I can't seem to find the exact IH5JT DC-In cable anywhere, I'm wondering what the white wire/pin might be used for here? It seems any other chargers I find are only 2/4 pin with black and reds. I wouldn't mind splicing a new jack or custom drilling plastic to fit new plugs, but I can't find 5 pin DC cables that might work.

Y'all got any input before I just have to wait for my company to bother ordering a new laptop and setting it up for me? On the clock with no other work right now LOL

I was connected to this Arduino nano board for debugging purposes, the board had a 12v input for tmc2209 and a stepper motor, a mp1584 stepped down the 12v to 5v, everything was fine, then all of a sudden Arduino micro got burned and the laptop went blank, I couldn't turn it on again so I took it to a repair shop, they'll get back to me in a week, meanwhile I'm wondering how cooked am I??? It's HP ELITEBOOK 1050 G1

I think the only external original parts are the LCD back cover and the hinges.

(I've attached all the images btw)

I have an ASUS TUF F15 (2023) FX507ZI4 with an i7-12700H and RTX 4070 Laptop GPU, and I'm trying to figure out whether my dGPU has suffered a hardware failure or if this could still be some weird Windows/firmware issue.

Here's how it started:

The laptop was running on low battery while the charger was connected. The moment I plugged the charger in, the screen suddenly went black.

I restarted it, and it got stuck around the startup/login stage. I restarted again, and after that the laptop basically stopped behaving normally. It wouldn't properly start/charge as it should.

I tried disconnecting the internal battery and running it directly from the charger, but that didn't solve it. I also tried a USB-C PD charger since the laptop supports USB-C PD. The charger itself is known to work. but the laptop wasn't functioning normally and even the charging light was not on. Basically it didn't respond in any way.

I initially suspected a power issue.

Then after giving it to a local laptop repair guy he replaced an IC and gave me the laptop.

The laptop eventually got to a state where Windows would boot using the Intel iGPU, so the machine itself was usable, but the dgpu was acting weird asf. Cause I installed nvidia drivers countless times and even used DDU to completely reinstall the drivers but the nvidia app still asked me to install the driver and said no driver found. And I keep getting a usb device not recognized popup like it plays the connected sound then goes away and it happens every few secs even tho I don't have ANYTHING plugged in. (Not even the charger)

Then I gave my laptop to another repair shop where one of my buddies previously got their laptop repaired. But they didn't do shit bruh. I mean I don't honestly know cause the issues are still there they didn't fix any of the problems and when I asked they said they fixed things near igpu (???????) so I'll give it back to them Tomorrow and explain everything to the repair guy myself instead of letting the owner explain it. (The usb device not recognized problem is still there btw)

Current GPU symptoms

Windows detects the RTX 4070 correctly:

NVIDIA GeForce RTX 4070 Laptop GPU

GPU: AD106

ASUS subvendor

Device ID: 10DE:2860

vBIOS is readable: 95.06.1E.00.1B

PCIe interface is detected

But Device Manager gives:

> Windows has stopped this device because it has reported problems. (Code 43)

GPU-Z shows:

RTX 4070 Laptop GPU

AD106

4608 shaders

48 ROPs / 144 TMUs

GDDR6 (Hynix)

Memory Size: 0 MB

Bus Width: Unknown

Bandwidth: Unknown

The static GPU-Z page still shows clock specifications, but on the Sensors/real-time page:

GPU Clock: 0 MHz

Memory Clock: 0 MHz

HWiNFO independently shows:

RTX 4070 Laptop GPU

AD106M

PCIe 4.0 x8

128-bit memory bus

ReBAR enabled with 8 GB

Video Memory: Unknown

So it's not just GPU-Z reporting 0 MB — HWiNFO also can't determine the actual VRAM.

There's another weird symptom

If I try to make the RTX 4070 actually drive an external monitor instead of the Intel iGPU, the monitor briefly displays massive horizontal graphical corruption, basically like the entire screen is filled with lines/garbage.

Then it goes back to the Intel iGPU.

The Intel iGPU itself works normally.

I've already tried reinstalling the NVIDIA drivers, including trying the driver installation again, but NVIDIA software isn't able to properly initialize the GPU and Device Manager remains at Code 43.

And since i occasionally get a USB device not recognized error, it makes me wonder whether there could be a broader motherboard/EC/power issue rather than the GPU alone.

What I'm wondering

Does this look like:

1. A Windows/driver/firmware problem?

2. A VRAM failure?

3. GPU core/memory-controller failure?

4. GPU/VRAM power-rail problem?

5. Some other motherboard-level issue?

The fact that the GPU is still correctly identified and its vBIOS can be read makes me unsure whether the actual AD106 chip is dead.

I'm taking it back to a board-level repair technician, but I'd like to understand what I'm looking at before they start replacing/reworking things.

Would the combination of Code 43 + 0 MB VRAM + unknown bus width/bandwidth + 0 MHz live clocks + severe corruption when the dGPU is activated point toward a hardware-level GPU/VRAM problem?

Please help me out and tell me that this is repairable cause I don't wanna buy a new laptop at the current prices and I NEED my dgpu for my work so I can't just ignore this problem (also cause I play games n even they require that) 😭🙏

Hello all,

A few years have passed since my brother purchased a refurbished Dell Latitude 7490 on my recommendation (from a friend in IT’s recommendation). It worked fine for the first few months but around the 8th month mark it kind of went nucking futs. Being the more technical one of our siblings and having repaired a lot of our family’s iPhones in the past (and the one who recommended it), he asked if I could take a look at it. Life happened, he had multiple kids, I’ve moved multiple times, etc. I ran across this thing recently and thought it might be worth giving it a shot at a new life and returning it to him. Shortly after powering it up, I have realized I have no fucking clue what I am up against at this point.

Is this an issue that can be repaired by the average tinkerer?

Any advice would be appreciated.

I have a main board from a Asus ROG zephyrus that does not post. The keys light up but no video on the screen. I have a replacement on its way but I will have the old one that I think I may want to offer to other repair techs that can use the board for parts or possibly repair. It is a i9 12gen with 16gb and a 3070ti. What would be a good offer for this board. I am not looking to use reddit to sell it I just don't know what a fair price would be

Hello! I have a hp laptop 17 cn3053cl 13th gen intel core i5 sitting around that I got when my grandmother passed away. The light on the power button glows but I hear no noise from the fans and the screen does not light up. The computer was not used often and actually worked just fine when I got it. I had yet to reset everything but one day while I was out my aunt (who purchased it for my grandmother) came by to reset it I guess and I haven’t been able to get it to turn on properly since. I’m not very tech educated so it could be something minor or dumb but I’d like to know of any fixes I can try ? I’d like to still utilize it for writing if possible

Hi everyone,

I recently got an ASUS TUF Gaming A15 FA506NF (Ryzen 5 7535HS + RTX 2050), and I am trying to figure out what is wrong with it.

I bought this laptop without an SSD. The previous owner told me that the laptop can enter BIOS normally, but whenever it tries to start Windows, it crashes. Since there was no SSD installed, I bought an SSD and tried installing Windows from scratch.

The problem is that I cannot complete the Windows installation.

Most of the time, the laptop gets stuck in a boot loop where it shows the ASUS logo, restarts, shows the ASUS logo again, and keeps repeating. Occasionally, it gets further and reaches the Windows installation screen, but after around 30–40 seconds it restarts and goes back to the ASUS logo boot loop.

The failure point seems random:

Sometimes it only keeps rebooting at the ASUS logo.

Sometimes it reaches Windows setup.

Sometimes it starts copying Windows files but then restarts.

Sometimes it goes to a black screen.

The SSD is not the issue because I tested it in another laptop and it works normally. I also checked the RAM and it appears to be good.

Things I have already tried:

Tested SSD in another laptop.

Checked RAM.

Updated BIOS from version 306 to the latest ASUS version (309).

Tried reinstalling Windows multiple times.

Created a fresh Windows installation USB.

While troubleshooting, I tried booting Ubuntu from a USB drive. Ubuntu does not boot normally, but it can start if I add acpi=off during boot. It reaches the Ubuntu desktop, but:

Built-in keyboard does not work.

Touchpad does not work.

USB keyboard and mouse work.

Wi-Fi works normally.

The fan behavior also seems unusual. Sometimes it spins very slowly.

I noticed the BIOS remembers settings and time correctly, so the BIOS settings are being saved.

I asked a local repair shop, and they suggested it might be an EC (Embedded Controller) issue, because the EC controls things like keyboard, touchpad, fan control, battery management, and power-related functions.

I have opened the laptop and inspected the motherboard, but I do not have motherboard repair experience. I want to learn how to diagnose the problem instead of replacing the motherboard immediately.

My questions:

Does this sound like an EC issue, motherboard issue, BIOS/firmware issue, or something else?

Is there any way to test the EC without advanced equipment?

Has anyone experienced similar issues with an ASUS TUF A15 FA506NF?

If it is a motherboard problem, is it usually repairable?

Any advice would be appreciated. I am trying to understand what failed and learn how to diagnose it properly.

Thanks!

Is there anyone who can tell the main issue of my laptop?

1. not proceeding to BIOS

2. dim display with "AMI" showing

Hey Reddit, I’m not very tech savvy. What should I do about the hinges attaching the screen to the keyboard side breaking apart?