It feels like the right hinge may break apart, can this be fixed with ease. I use a iFixit Pro Tech Toolkit but overall never seen one taken apart.

Any help would be welcome!

Product Name - Lenovo Z50-75

Model Name - 80EC

Machine Type Model 80EC00HFUK

⟐ Edited November 26, 2025 at 16:16 MST

⟐ Commented August 21, 2025 at 6:40 MST

I’ve been trying to fix my Lenovo Z70-80 laptop for about two weeks now. I’ve already tried a lot of things, but after looking online, I started suspecting the BIOS.

I ordered a CH341 programmer and connected the desoldered BIOS chip to it. What should I do next? I’ve heard that it is not as simple as just flashing a .bin file, and that some BIOS sections should be reprogrammed while others should not.

Where can I find the correct .bin file for this laptop, and is there anything special I need to do before flashing it?

Thanks in advance for any help.

⟐ Commented May 07, 2026 at 5:31 MST

I’ve had this problem for a couple of years now, either I’ll try to fix it or sell it but I just can’t seem to find the reason for this happening.

Problem: I tried turning on my Lenovo Z50-75 one day and all I would get is a black screen and the fans running really fast, blowing out a lot of air. I’ve tried multiple things but had no result.

I know that there nothing wrong with the screen because when I would turn it on previously the webcam light (the LED which would turn on when the webcam was active) would blink at startup but now with it doing this it doesn’t turn on at all, I just get a non-working black screen with a two second pause before the fans go turbo mode.

I’ve tried;

- Switched out each RAM sticks before completely changing the RAM sticks

- Taking out the battery and just using the charger to turn it on

- Plugging in HDMI into an external TV and then monitor

- Letting it charge for at least 10 hours with it running, then leaving it to charge without it running

- Changed the HDD multiple times with different Windows/Linux operating systems

- Format HDD to try reinstall Windows on the original HDD

- Hard restart the laptop - take battery/charger out and keep the power button pushed for 30 seconds

- Taken out the fan and given it a good clean

If I don’t hard restart it then when I turn it on, it would straight away turn on the fans but if I did a hard restart it then it would wait 2-3 seconds before the fans came on and maybe give it a chance to come on.

Sometimes in the past, if I hard restarted it, it would turn on occasionally but it would be very slow and crash after an hour or so of usage then it would repeat with the fans and black screen problem. If I sometimes mess with it by changing around the RAM sticks it would sometimes work but now it doesn’t do that anymore

I’ve had a problem trying to the back frame off after unscrewing all the screws. I’m afraid if I try anymore it’ll most likely break so I can’t get to anything inside, I wanted to try change the thermal paste but I can’t get into it. I just have access to the battery/wifi card/RAM/HDD/fan

⟐ Edited November 26, 2025 at 17:02 MST

⟐ Commented May 09, 2019 at 14:27 MST

CPU: i5-5200U

GPU1: AMD R9 M375

GPU2: Intel Graphics 5500

my laptop was working good till yesterday and suddenly a blue screen had appeared with the error code: thread_stuck _in_device_driver

then the windows did not boot again

then i setup a new windows after that when i try to start any game with the AMD GPU

it does not start or crash at start or give me a full screen of glitches.

I tried every thing

-clean AMD drivers (with DDU in SafeMode)and install latest one.

-clean AMD drivers again and install old drivers from Lenovo website

-reinstall the windows .

the games works fin with Intel GPU but when I change to AMD it is going crazy

how can i fix it ?

⟐ Answered September 13, 2018 at 21:42 MST

My laptop runs great as long as it is plugged in, and left on or in sleep mode. If it gets turned off or unplugged it will not turn back on normally. It used to take 15 minutes up to few hours before the Lenovo logo came on, now it’s stuck on black screen for two days. There is a single BIOS beep when plugged/unplugged while the battery is in. From what I googled, it seems to signal normal booting. The light indicating that it is turned on lights up and is solid (not blinking). The screen is black and the Caps/NumLock light will not turn on. I can hear the fan running, CD-ROM ejects etc. I tried all the usual tricks and nothing. Before, if left plugged in and “on”, it eventually would boot up on it’s own, hours later. But now it’s been too long. What does this mean? Possible to resurrect?

Besides the myriad battery/motherboard/RAM/hardware solutions on the Internet, one suspicion I have is the computer being unable to find/load Windows. The reason I think so is because before the issue emerged months ago, I remember playing with tweakings and cleaning software that also targeted system files, especially the bloated Windows updates junk, among others. Could this be a factor? If so, is there a fix under the circumstance of laptop not booting? Thanks.

⟐ Commented May 08, 2019 at 19:00 MST

⟐ Commented July 24, 2023 at 8:58 MST

⟐ Answer accepted July 22, 2018 at 8:26 MST

What is the problem, Even change new Screen And motherboard Still black screen..But there is Light sign on..

⟐ Edited November 26, 2025 at 17:02 MST

⟐ Answer edited June 16, 2022 at 3:09 MST

I plugged a jack into my laptop while it was powered by phantom power. The machine just “snapped” and went black. There is no signs of power, the leds don’t light up. Is there any chance to save this laptop easily, or do i need a new logic board?

Thanks

⟐ Edited November 26, 2025 at 16:16 MST

⟐ Edited November 26, 2025 at 16:16 MST

⟐ Commented August 15, 2025 at 2:10 MST

This the SPECS :

Display: 15.6-inch Full HD (1920x1080)

• Processor: Intel Core i7-4510U (4th generation)
• RAM: Up to 8GB DDR3L
• Storage: 1TB HDD ( Change to SSD 120GB )
• Graphics: NVIDIA GeForce 840M
• Operating System: Windows 8.1 (or later) (and i update it to Windows 10 22H2)
  
  But after update the windows 10, i face a Crashing Bluescreen problem looping over and over again, I use the troubleshoot For a corrupt file, it worked for awhile..Then It Happen again..Anyone have a solution? Is i7 4th Gen not support windows 10? and my GPU does not show at the task manager.
  
  question :
  1. How to fix the Blue Screen loop after update, even i reset many time..
  2. Why my Nvidia GPU and intel not showing in task manager.

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