A TFT panel that differs with the original one in display colors, respond time, contrast ratio or all of them, can i use it as replacement? If not, would it damage the logicboard or the panel itself if i try to replace?
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Well, due to my grid tie inverter not accepting high voltages, and the fact that the lions in my solar panels are 36V (72-cell) I think I need to stick with 72-cell.
However I have a few smaller panels that are 36, 32, and two 30-cell. The 36 and 32 together run at 75% efficiency (and subtract more with additional inefficiencies) when running in parallel with the 72-cell panels. The kicker is that the two 30s... generate 0% power when connected in parallel(!)
So now what to do with these small panels?
I could sell them...
Or I could shim them.... -
Good morning, everyone!
I've gotten my hands on a few laptops with various defects because I want to get more involved in repairing electronics.
First up is a Fujitsu Lifebook U7511.
It won't turn on anymore and doesn't respond in any way when you plug in a power adapter.
Model: Fujitsu Lifebook U7511
CPU: Intel Core i5-1135G7
GPU: Intel Iris Xe Graphics
RAM: 16GB DDR4 - 3,200 MHz
PCB manufacturer: ASKPCB?
PCB serial numbers: CP801602, CP7984241-Z4, E239218, CP809978-01
Damage: Liquid damage
The liquid probably...Today, 03:09 AM -
Hp Probook 450 G7 s# SCD0348W35 had a locked BIOS. Bought BIOS and EC chips off Ebay that were supposed to match this machine - the 450 G7. Flashed in the BIOS on chip i bought using a CH341. BIOS unlocked next boot. Some error to contact HP. Entered BIOS and reset to system defaults and rebooted. Machine worked fine but every cold boot the contact HP message popped and everything else worked as fine. Assumed the error was from EC chip not matching BIOS that i just flashed in. So i flashed in the EC that was supposed to match from the EBay chip i bought and instant brick.
Ive got...07-08-2025, 09:24 PM -
Hi everyone,
I’m currently learning about the USB protocol and designing a project, but I’ve encountered a few questions that I couldn’t find clear answers to. I’d really appreciate your input!
1. USB 3.2 Gen 2×2 with SuperSpeed Type-A Connector
According to the USB 3.2 specification, it states that USB 3.2 Gen 2×2 can support a SuperSpeed Type-A connector. This raises a question:
If we use a SuperSpeed Type-A connector, the system would only utilize 1 lane for data transfer, leaving 1 lane from the host unused. Is this configuration valid,...06-26-2025, 03:27 AM -
Hi I am trying to refurbish this crossover with some higher quality poly-caps/parts... The speaker is a in-wall Polk 65-RT... Key questions I have are:
1) What in the world is the yellow part on the board (label is MET 1.0J 100V)?... Should I even consider replacing it?
2) The 470uF cap.... Does anyone know have a suggestion as to where I can find a reasonable audio quality polycap near that value? (or at least 3 160s or the like?) { I don't want to spend $70 just to replace this one if I can) (maybe even someone looking at this circuit could even tell if this cap is important...
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