Electronics Repair Fails and Mistakes
Hello guys. Long time ago I was fascinated by electronics so I started learning more and more about them. I was always fascinated by the fact that I could take something dead and revive it. My uncle was a repair technician and used to show me all kinds of tricks and tips in electronics repairing. I was always good with my hands and I have fixed many devices since now. Mostly PCs and Snartphones. Today as I was opening a samsung galaxy s6 the screen broke. I am very disappointed with my self. I have done things wrong in the past and broke approximately 3 devices since I started the repairs. I have successfully managed to repair about 40 to 60 devices until now. But sometimes I feel like I can't do it anymore because I don't want to break things but I want to fix them. Also my parents told me that if I keep failing like that I won't be able to make money and I will always throw away money on taking the responsibility and refund the device owners for the damage. I don't know guys. Please tell me. Have you ever failed? Is it so difficult? Am I not going to succeed? Will I ever stop making these mistakes?
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Last edited by NikolaosPet; 03-19-2021, 04:58 PM.
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Hi,
I have a Fujitsu Lifebook E547 vPro that does not boot anymore after Windows Update tried to install a new Bios version. Screen stays black no post - only the numblock light blinks.
What I've tried:
I have used my CH341A to read the bios chip (25Q128FVSQ) (Dump attached) - I think the dump is "good" because I could find the Serial number in the data and also the Winkeyfinder found a windows key.
for the lack of any other Idea I took the bios from this post (https://www.badcaps.net/forum/troubl.../troubleshooti... -
Good morning everyone, this is my first post and I apologize in advance if there are any mistakes in the post.
I have a Lenovo Legion Slim 5 16IRH8_LOQ with the typical issue of stripes on the screen, but I made the mistake of replacing the screen without physically removing the battery, thinking that just pressing the SW2 button would be enough – it wasn't. The board showed consumption, with LED6301 lit up and PU301 getting very hot. I replaced PU301. Now, the board is not working correctly, but it has no consumption, LED6301 stays on, and I haven't found any other signs of a short... -
Hello everyone,
I'm working on a Dell Latitude 5490 with a LA-F401P motherboard that has a very peculiar issue, and I would appreciate your insights.
Initial Problem:
The laptop was completely dead, no signs of life, no power LED.
Action Taken:
I flashed the main BIOS chip with a clean dump. This brought the machine back to life, but with a strange limitation.
Current Situation & The Main Issue:
The laptop now works perfectly when powered through the USB-C port. It charges the battery, powers on, boots into the OS, and functions 100% correctly.... -
Hello, I have an issue with the motherboard. Specifically, it doesn't power on, more precisely, the POST initialization doesn't occur.
Let me start from the beginning, the motherboard suddenly stopped working one day. There are no beep signals from the speaker, and the debug LEDs are not lighting up. After inspecting it under a microscope and using thermal imaging, I didn't find anything that could be damaged.
After that, I began voltage measurements, in which I noticed the absence of VDDQ, VDDP, VTT, and VPP lines. Later, I checked if there is an EN state on these lines,... -
Laptop model: Sp513-54n-74V2
Testing power rails (separated by chip) reveals:
19V_DCBATOUT - (active)
5V_AUX_S5 - (active)
5V_S5 - (active)
3D3V_AUX_S5 - (active)
3D3V_S5 27Ω - (good) - enabled by Nuvoton chip
1D8V_VCCIN_AUX - (good) - enabled by 1D8V_S5 PG signal -- (dependent on 3D3V_S5)
1D8V_S5 41Ω - (good) - enabled by 3D3V_S5 PG signal
1D05V_VNN_BYPASS - (good) - enabled by 1D8V_VCCIN_AUX PG signal...