This summary of the video was created by an AI. It might contain some inaccuracies.
00:00:00 – 00:14:57
The video documents a technical investigation and repair attempt on four broken computer monitors. The presenter examines various models, starting with an Asus 24-inch LED monitor deemed unfixable due to a severely damaged screen. They then focus on an HP 25-inch display with a burnt chip, and after sourcing and soldering a new chip from AliExpress, attempt to power it, but encounter further issues. A thermal camera reveals no overheating components or issues with power flow, leading to a second replacement of the chip. Eventually, this resolves the fault.
The process continues with troubleshooting a Samsung monitor that shows no immediate issues upon initial testing. Next, the presenter uses a water and isopropyl alcohol mixture to remove adhesive from another monitor, observing reactions when reconnecting its backlight. Voltage discrepancies indicate potential internal faults, prompting further disassembly and testing.
Specifically investigating the backlight circuit, the presenter finds inconsistent voltage readings, ultimately deciding to replace a suspect chip with one from eBay. Despite the replacement, the backlight fails to power on correctly, concluding that the monitor remains unfixable for now. Out of the four monitors worked on, only one was successfully repaired. The presenter ends by expressing openness to further suggestions and thanking viewers.
00:00:00
In this part of the video, the presenter examines four broken computer monitors to see if they can be fixed. The first monitor, an Asus 24-inch LED, has a broken screen and is deemed unfixable due to the challenges and costs associated with replacing the screen. Moving on, the presenter inspects an HP 25-inch display that powers on but shows no display. Upon disassembling it, they find a main board and an LED driver board. A closer inspection reveals a burnt chip on the main board, which is likely the cause of the issue. The presenter plans to replace the faulty chip, which they managed to source from AliExpress, using a hot air soldering station. After successfully soldering the new chip and cleaning the board, they prepare to reassemble the monitor to check if the fix resolves the problem.
00:03:00
In this part of the video, the creator investigates a burned chip on a monitor’s circuit board. After examining the board, they find no blown fuses or overheating components. They decide to reinstall the new chip and test the monitor by powering it on, but it doesn’t turn on. They disassemble the monitor again, noting that nothing appeared to explode and the new chip seems fine. They then attempt to diagnose the issue using a thermal camera, but find no significant changes, indicating that power isn’t reaching the necessary components.
00:06:00
In this part of the video, the creator troubleshoots a potential issue on a circuit board by focusing on a chip that seemed to be lacking required voltages. After consulting the data sheet and verifying the issue, they decide to replace the chip again due to possible faults in the first replacement. Upon replacing the chip, they test the power, and the board functions correctly, indicating the issue was resolved by the new chip.
Next, they test a large Samsung monitor that initially seems to work when plugged in, indicating no immediate issues. The creator decides to further test this off-camera and moves on to another project involving a monitor with a packing label stuck on its screen. They use a 50-50 mixture of water and isopropyl alcohol to carefully remove the adhesive without damaging the screen’s coating, and confirm that this method works well.
00:09:00
In this segment of the video, the presenter works on removing adhesive from a surface using a mixture of isopropyl alcohol and water, allowing it to soak to ease the scrubbing process. After removing much of the adhesive, they prioritize checking if the panel functions correctly before proceeding further. Upon testing, power is indicated by a backlight but the display does not turn on. They experiment by unplugging and replugging backlight connections, observing different reactions on the panel. The presenter identifies that voltage readings seem correct initially but issues arise when powering on the panel. They find that something is boosting voltage to 53 volts when one backlight side is disconnected, a boost not happening with both sides plugged in, hinting at a potential issue in one of the small chips on the board.
00:12:00
In this part of the video, the presenter is troubleshooting a faulty board, specifically investigating a chip related to the backlight circuit. They locate the chip’s data sheet and begin testing various pins. Pin 5 is checked and found to have 3.1 volts, which is within the required range to enable the chip. Pin 7, the output pin, shows 1.9 volts, but it’s unclear if this is adequate since the data sheet indicates it should be 5 volts. The VCC pin (Pin 8) correctly outputs 5 volts, and the voltage supply input (Pin 9) provides 19 volts. Despite these readings, the presenter is unable to find how the board generates the necessary 53 volts for the backlight.
The decision is made to replace the chip, sourced from an alternative board found on eBay. After soldering the new chip, the board is tested again. However, the backlight fails to turn on, showing insufficient voltage for the LEDs. Ultimately, the presenter concludes the monitor is unfixable for now but remains open to suggestions and further testing. They also mention successfully fixing one out of the four monitors they worked on and thank viewers for watching.