Recent content by mikey5791

  1. mikey5791

    My LG monitor does not work!

    Is your LG Flatron 1940s not showing any power on and dead completely? Maybe is good idea you need to open up the outer plastic casing and look for any bulged or burned component on the power supply board.
  2. mikey5791

    repair pc power supply

    Have you tested for shorts on those 3 leg mosfets you took off from the two separate heatsinks?
  3. mikey5791

    Help revive dead Lanyu airpad

    By briefly touching for less than 10 seconds the li ion battery connector to the airpad battery connector, i try the finger touching method to see which component is overheating. Finally, i noticed one square ic labelled AXP192 is hot to touch. It is a power management ic. Anyone know how to...
  4. mikey5791

    Help revive dead Lanyu airpad

    Very interesting and informative videos. I find the second video much more applicable and easier to understand. Will definitely try out the voltage injection using my manual adjustable dc power supply. Appreciate your help. Thank you so much.
  5. mikey5791

    Help revive dead Lanyu airpad

    The second option of covering pcb with isopropyl alcohol seems to be easier for me. What sort of regulated dc power will be suitable, like around 3vdc...or up to 5vdc? Fyi, i have a manual adjustable dc output power supply which outputs from 0-12v dc. Instead, will it be ok if i used the factory...
  6. mikey5791

    Help revive dead Lanyu airpad

    Today i unsoldered the suspect diode and test it out of circuit and it reads 196ohm one way and "1" the other way. So, this diode at D1 still good. What other test i can perform to check for bad component? It looks as if now the airpad is completely dead. I plugged in the original lipo battery(...
  7. mikey5791

    Help revive dead Lanyu airpad

    Done a 15 minute recharging the original 3.7v lipo battery, then i attached temporarily to the airpad battery connector for less than 10 seconds to check for overheating components. Too bad there is none. When i use dmm to measure the dc voltage on battery, it reads around 3.7vdc but almost zero...
  8. mikey5791

    Help revive dead Lanyu airpad

    As the original 3.7v 3200mAh lipo battery was cut off and kept aside, i plugged in the 5v ac adapter and still barely get 0.3v dc at the input connector. Unplugged the ac adapter and i use my dmm diode test on D1 the one nearest to the dc input connector. The diode reading on dmm is about 32ohm...
  9. mikey5791

    Help revive dead Lanyu airpad

    With the original 3.7v lipo battery removed, i used another 3.7v lipo from a powerbank to switch on power. Still the airpad doesn't power up. You are suggesting me to slowly charge the battery around 3.5v, but how do i do it with a 5vdc charger? Is it ok to connect some sort of resistor to the...
  10. mikey5791

    Help revive dead Lanyu airpad

    Hi forum friends, Greetings! This Lanyu airpad model 910 was bought in 2016 and working good till i put in storage around late 2019. Today i took it out and switched on but there is no power led on. I plugged it to the 5v ac adapter for charging but there is also no charging indicator. I...
  11. mikey5791

    Help to revive damaged Vivo Y21 mobile phone

    Done that, i called the authorised service centre but they do not have parts for my vivo model. also the phone is more than one year warranty period, warranty policy does not apply.
  12. mikey5791

    Help to revive damaged Vivo Y21 mobile phone

    Hi forum friends, Greetings. I came to this forum for help as it has been helpful to solve many of my electrical problems in the past. This phone was working fine for about 2 years but suddenly goes to blank display after the charger exploded during a thunder night. Now the mobile phone can no...
  13. mikey5791

    Help diagnosing AC Sliding gate controller stops halfway

    Martin, The tiny cap is a 220uf 16v electrolytic, it is not swollen or domed but out of curiousity i pulled it out and test off board on an esr meter. The meter shown it as "unknown damaged". Using a capacitor meter, it only tested as 96uf which is way off. Bravo! I think we solved the mystery...
  14. mikey5791

    Help diagnosing AC Sliding gate controller stops halfway

    Sorry it is not the unit i am using now eventhough the model no. SL1000 is correct. My board is completely different. I don't recall this board has a safety limit timer of any kind. Thanks anyway for the manual. It helps me to understand more on the preventive maintenance.
  15. mikey5791

    Help diagnosing AC Sliding gate controller stops halfway

    Not sure where is the safety limit timer. Which component should i check?
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