The laptop fails to power on following a repair process.
The laptop fails to power on following a repair process.
I've upgraded the thermal paste on my Lenovo Legion5 (i7 10750h, RXT 1660 Ti). It was overheating, so I decided to reapply myself. I followed a tutorial carefully but wasn't fully confident, so I didn’t tighten the screws properly. After turning it on, temperatures dropped significantly. Using Cinebench showed improvement, but after a few minutes the screen would freeze and then crash. I restarted, but the problem repeated instantly. I tried again with fresh paste, but it still failed. My screen started strange patterns (photo attached), and when I pressed power, nothing appeared on the screen except a blinking backlight, followed by fans spinning for a few seconds before shutting down. Am I dead? Or can this be fixed? Could old paste be the cause?
What thermal paste did you use? It's not electrically conductive, no? And did you re-paste both the CPU and GPU? Maybe looks like a GPU issue or maybe a monitor's as well. If you have another monitor (a TV also works), then check if you can get a display on it through HDMI. Check if you get any POST error code when trying to boot. It could be shown my some kind of LED in the laptop body blinking in a pattern. Did you accidentally spill thermal paste on the motherboard or other parts? Do you think maybe some water or something else might have gotten in?
I included an image of the thermal paste, but it isn’t conductive. I reattached both the CPU and GPU. When trying to connect to the TV, the issue isn’t the screen. It appears I applied too much thermal paste initially. Could expired thermal paste be the reason?
You watched a specific video. When you press the power button and the fans start spinning but then stop, they usually turn off again if you leave it on. If the laptop seems completely off, it might not be dead—possibly due to loose screws affecting its operation. Based on what you shared, I suggest trying to reassemble the laptop and checking the connectors. Also, please send a picture of the motherboard for further help.
I don't agree. Did you check? Also, verify that all connections are secure and the inner cables are properly connected. I recall that when the display wasn't showing up, it was because the display wasn't installed correctly, which is why I couldn't see anything. You might want to bring it to a repair shop for a thorough inspection of the motherboard and other parts.
The power button remains illuminated. I verified the wiring and connections; everything seems correct. I believe a repair shop is necessary. Appreciate your assistance.
Can you get a closer picture at the GPU and CPU. It's hard to tell from the picture but it almost looks like 2 resistors are missing on the GPU. Also there is far too much thermal paste on those dyes. You really only need thin layer/a small pea size spot on each dye. The cooling system will spread it, when you remount it.
It just seems to have been the lighting. Everything looks fine, no ripped off solder pads. I also want to make sure that when you are trying to power it on you have the charger connected right? From what I could tell Everything looks fine and I'm not certain what may have caused this issue. I would recommend taking it to a repair shop sadly.