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  1. mikey5791

    monitor power supply/inverter repair

    Hi untoreh, What is your monitor model no? Normally the problem is likely at power supply board for monitor that goes black after 2 seconds. Clear pictures of your board will be helpful.
  2. mikey5791

    Total noob trying to get dirty

    Hi Solitonsnap, Have you checked your adapter has DC power of 9V and working ? I assume you have checked the Maxell cr2032 3V battery is no good. That is why you intend to replace it. Normally, it is just a clip which you can lift up little bit and the battery will come loose and easily...
  3. mikey5791

    Total noob trying to get dirty

    Hi Solitonsnap, Your drum machine should come with a DC adapter for 9V (300ma) or find an equivalent one for power. Sorry I do not understand when you said "The first obvious thing is to get a new battery" because I am unable to locate any battery being used here. Have you been using the...
  4. mikey5791

    How do I test these Mosfet ?

    Hi all, Yesterday I go thru some of my used parts and found the following three Mosfet (or are these transistor ?). I know that if the Mosfet with label put on top of a table with three pins pointing to my direction, the left pin is Gate(G),middle pin is Drain(D) and right pin is Source(S). For...
  5. mikey5791

    Can I use this LCD monitor panel ?

    Hi all, I have a working Dell E190SF computer monitor but the screen is damaged due to the monitor dropped to the ground. When connected the LCD screen split in the middle and the whole screen is complete unusable. (refer image 0887) However I have a spare working computer monitor from LG...
  6. mikey5791

    Help on how to test this device

    Hi all, After so much feedback and advice, I believe this device is safer for the rubbish bin. Thank you.
  7. mikey5791

    Help on how to test this device

    Hi Dorke, The info as you requested are as follows: U1 (3 leg transistor) 431L F20 JRC IC1 (3 leg transistor) H949 TO......(unclear) 10.......(unclear) OP1 (4 leg opto)...
  8. mikey5791

    Help on how to test this device

    Hi Martaine,Davenn,Alec_t and others Thanks for reply. Yes the transformer core(black soft magnetic core) has snapped and split on top. Is there any safe way to repair the split core ? Can I use super glue to join? Or is it safer to throw away? Martaine, FYI, the big green cap near AC is...
  9. mikey5791

    Help on how to test this device

    Hi all, Recently I acquired this mini DC supply adapter,but it lack of any cover with missing mains AC cord 220V. The only identification on the pcb is YY 121 but I am not sure what is the output DC voltage. Before I connect a new mains AC cord (the two yellow wire),what are the test I need to...
  10. mikey5791

    Looking for service manual LG Flatron L1942T-PF monitor

    Martaine2005, thanks for the service manual link and your note on the fuse. Apparently I got the wrong manual (Model E1942 S) on my first search at LG website. Your manual helps a lot. Davenn, appreciate you pointing the Q101 as power FET SSS7N60B; which later on I saw on page 28 schematic...
  11. mikey5791

    Looking for service manual LG Flatron L1942T-PF monitor

    Hi all, Last week, a friend gave away a faulty non working LG Flatron 19" LCD monitor model No.L1942T-PF which was repaired by a technician earlier. I opened the casing yesterday and noticed the power supply backlight inverter board model No.LGP-002L is missing two components by looking at the...
  12. mikey5791

    Rest in Peace, Kris

    Kris helped me with my first electronic kit project and his friendly approach and patiently explaining each step in diagnosing a problem had stirred my continuing interest in learning electronics repair. He deserved my utmost salute for his knowledge and his love of sharing with others. Before I...
  13. mikey5791

    Need help diagnose HP2009f LCD Monitor

    Hi all, Just managed to upload two photos due to slow connection.
  14. mikey5791

    Need help diagnose HP2009f LCD Monitor

    Hi all, A friend of mine came recently to ask for my help to check a HP2009f LCD monitor with no display which I said will try my best. First thing I do is to plug in the power cable and switch on, but no display, not even blue led light on the power switch. I shine a torch light at the screen...
  15. mikey5791

    How to test CCFL ?

    Hi Y2KEDDIE, Your explanation on CCFL is informative and helpful. As the ccfl is not polarity sensitive, I connected the pink and white ccfl wire to inverter output then feed the inverter input to 12V DC battery supply as image attached. Voila, there is light from the bulb and tested for...
  16. mikey5791

    How to test CCFL ?

    Dear all, I recently acquired a pair of CCFL (backlight tube) from a damaged Sharp 10.5 inch LCD Display Screen Model LQ15x14. One of the backlight tube with pink and white wire is seen from img 0647 as attached. I wish to use an inverter for CCFL (img 0646) to light up the backlight tube. The...
  17. mikey5791

    [woo] Does anyone know of this breakthrough technology ?

    After reading through all the comments, I agree the said energy saver technology is merely unfounded theory using a lot of jargon such as nano tech particles. I personally doubt the effectiveness of reducing electricity bills by placing a "card" on the consumer mains unit. Thanks to all who...
  18. mikey5791

    [woo] Does anyone know of this breakthrough technology ?

    Hi all, A friend of mine recently introduced and tried to convince me to buy an electricity saving package in the form of a credit card size card called The Kings Saver. You may refer to this website for additional info at http;//wingslab,com.my/products-services/. It is a breakthrough and an...
  19. mikey5791

    How to test this fan

    Hi, I recently salvaged this fan marked as SUNON DP 200A 220-240V 50/60 HZ 0.14A Impedance Protected (refer img-0478). The issue is the AC Mains in my country is 230V but the fan have two green cable running out from the unit (refer img-0479). My questions are as follows: How do i know which...
  20. mikey5791

    How to make use of this

    Hi, I have a dissamble a broken Kenwood breadmaker Model No.BM200 and managed to extract the motor unit and the attachment belt (for spinning the bread pan flipper). The motor unit is marked "WING SHING PRODUCTS (BVI) CO.LTD MODEL : WS 862325...
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