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  1. 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...
  2. 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...
  3. mikey5791

    Help diagnosing AC Sliding gate controller stops halfway

    Hi forum friends, This is my home AC sliding gate controller which has been working faithfully since year 2012. Few days back, when i press the button on the remote control to open, the gate opens full length with no problem but when i press the button again for closing, the gate stops at...
  4. mikey5791

    Acer AL1717F blue led light does not turn on

    Hi all, I have this Acer AL1717 F working lcd monitor, but yesterday the blue led light on the front switch does not turn on and thus no display on screen. Upon opening the outer casing, and looking at overall board (image 112637), i do not see any burned parts or bulge caps. Fuse T2A measured...
  5. mikey5791

    Acer v203HV turns pink then white display

    Hi, This Acer v203HV lcd monitor has been working normal for more than 5 years until yesterday. When i switched on, the normal Acer logo appears but after less than 1 minute, the display turns pink hue( image 090232),shortly it becomes white (image 090246). So i opened up the monitor case...
  6. mikey5791

    Need help diy a power bank

    Hi friends, Got this simple power bank of 8800mAh capacity but the inside battery seems to be failing. It is not taking any more useful charge. The dmm measured the battery reading about 0.17vdc. The input is rated at 5v 2.0A. I was thinking about replacing the failed battery with some extra...
  7. mikey5791

    Need help on Dell S2330MXC lcd monitor white display

    Hi, Pulled this monitor from storage and tried switched on power but i only got white display. Not sure whether this monitor worked in the past. I searched for schematic or service manual for the monitor and board model 715G4924-M01-000-0H4F but there is no info whatsoever. Checked the fuse F701...
  8. mikey5791

    Help on Dell 2007fpb led conversion

    Hi forum friends, Got this working monitor from a friend free yesterday but all the ccfl bulbs seems to be dead. So i am planning to convert those ccfl to led. The pcb consists of 3 separate boards from my image img 090901. My led conversion kit requires me to look for enable on off pin and DIM...
  9. mikey5791

    Help diagnose Sonic Gear 2.1 computer speaker woofer no bass

    Hi forum friends, Yesterday when i switched on my pc to play some mp3 on this speaker, i noticed the music is coming from two side speakers but the bass(woofer) speaker no sound. Normally the bass will pump out some vibration. I fed dc3v to woofer speaker red and black wire at sp near cap c23...
  10. mikey5791

    Help diagnose LTQ70 soldering iron no heat

    Hi forum friends, Once again i come to this forum for assistance. In the past, i have been getting a generous amount of help in repairing and appreciate it so much. This morning i found out this soldering iron no more producing any heat, but the neon light is on. I pressed the button to heat up...
  11. mikey5791

    Help diagnose Vinnfier sub woofer no power on

    Hi, When i switched on ac power, there is no blue led power on. So i suspect something gone bad at the power board. Not able to search any schematic. Noticed a dual op amp 8 pin 4558d jrc 0058t, i googled and found vcc is pin 8 and ground is pin 4. Another set of 5 pin mosfet tda2030Al are audio...
  12. mikey5791

    Help on Samsung Syncmaster 732N led conversion

    Hi, Yesterday i received this lcd monitor free but the owner says the backlight doesn't work anymore. I removed the metal case and tested the main and power board on an acer lcd monitor and the lcd display comes out fine, meaning the power board and inverter still in working condition. Now my...
  13. mikey5791

    Acer Aspire 4738 laptop intermittent shut off

    Hi, I have been using this Acer Aspire 4738 laptop for many years with no issue. Running windows 7 and use for my daily work but for last two months it is shutting off intermittently. Complete blank display, sometimes it shows blue screen and asked me to restart. After restart it still the same...
  14. mikey5791

    Help fixing Digital Multimeter Proskit MT1210

    Hi, Yesterday i was using this dmm dc voltage 500v setting to check on a computer power supply by putting black negative probe to negative side of primary main cap and red positive probe to one of the diode cathode. I saw dmm reading briefly about 862dc; then a pop sound from my dmm. It is a...
  15. mikey5791

    Acer Aspire 4310 laptop power shut off after 2 seconds

    Hi all, I have been using this laptop since 2007 without any issue. I have not added any hardware or install software since. Two days ago, when i switched on ac power as usual, the power led lit for 2 seconds and it shuts off without going to bios. The cpu fan doesn't even spin. The charger...
  16. mikey5791

    Yonanas ice cream maker won't turn on

    Hi all, This Yonanas brand ice cream maker was given to me at no working condition. The previous owner said it was working fine before. So i did try switch on power but it shows no life, motor not turning. So i opened it up, desoldered the 4pcs black diode marked 5408. Tested using an analog...
  17. mikey5791

    Vivo travel charger not charging

    Hi, Been using this over a year to charge my vivo phone without issue but yesterday it stop charging. I pry the case and found the split 1k ohm resistor. I wish to know if it is ok to replace the split 1k ohm resistor with a 1.2k ohm resistor as on picture since I do not have the exact resistor...
  18. mikey5791

    Need help repair Sunshine ATX psu

    Hi, Got this el cheapo China made ATX psu Sunshine Model NS235W from a garage sale. The owner does not know the psu condition. When I got home, since there is no sign of burn marks and fuse tested with continuity, I plugged in to mains, I replaced the fuse by a 60w light bulb and shorted the...
  19. mikey5791

    LG Flatron L1942T-PF monitor no power

    Hi all, Got this LG Flatron L1942T-PF LCD monitor free from a friend but the problem is it does not have display power (power board model LGP-002L) and lacks a main transistor at Q101. After searching thru service manual, I installed a mosfet SSS7N60B at Q101, replaced all the secondary filter...
  20. mikey5791

    Need help diagnose Samsung Syncmaster 153V monitor

    A friend sent me this old Samsung Syncmaster 153V LCD monitor to repair. The problem is power board no power, completely dead no light whatsoever. the power switch led no light during testing or after switched on main. I had some basic skills in repairing dead monitor with a soldering...
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