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Please identify the blown off IC in this power board of HCL. 15.6 inch LCD monitor. HCMDLWBT 11 , details not found in web

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The power boards from mine looked similar to one another and looked almost the same as yours , I would look at acer or view sonic or other 15.6 monitors and try to match the power board .

Posted on Nov 21, 2012

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Posted on Jan 02, 2017

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firesnake09
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SOURCE: LCD Monitor Acer AL1717 shtting down problem

Hello,

Aside from the capacitor and IC, there's a relay that you need to change. You need to locate that defective relay on the PCB and replace it.

It would be best to consult the manufacturer of the LCD and get the exact part number of it.

Have a great day!

Regards,

Firesnake09

Posted on Apr 26, 2009

mgroomsn002
  • 76 Answers

SOURCE: HCL LCD Monitor display problem

f54188a.jpeg Bad Capacitors on the power board

Posted on Jul 05, 2009

  • 1 Answer

SOURCE: HCL HCM780M CIRCUIT DIAGRAM

SIR..., regarding monitor...display block characteristics which is operated manually by buttons situated bottom of monitor is anytime coming at the centre of monitor display... The settings block comes on suddenly and we are unable to exit from the same sometimes the block goes off without any action and everything is fine till it is back again and it is come again and again.....by all this i did'nt work on my PC...all result it's useles......please sir giving your suggestion as soon as possible....... This has been happening for the last 1 year and is a real pain Please send some solution

Posted on Jul 27, 2010

electrotech1
  • 1126 Answers

SOURCE: Hannstar IH252HPB 25" LCD monitor has 2 burned

Go to www.partstore.com to get new parts for your set.

Posted on May 26, 2011

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Won't turn ON. Found F601 fuse blown on power supply/inverter board. What's the most likely culprit?


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On the monitor power board you find an IC called push pull transistors,it is usually paired get to read this IC with your miter a pair of this IC must have gone bad.If dictected replace it, then power the power board and it will display normal.Thank you Jesus.

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NO Bad Capacitors on the power board i have some problem in my HCL lcd monitor, my monitor display is on but at a time the display is gone. when i swicth off and on monitor power the monitor display is on ofter 2 sec the display is gone so that is the problem.

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Samsung lcd monitor 153V has no display power indicator (green) is ok found 1 ic AE3U1T burnt. is this ic available or has the psu and backlight panel pcb to be changed.. dtgandhi@gmail.com


Samsung 153V LCD Monitor Power Supply Repair Tips


Troubleshooting Samsung 153V LCD power supply is just like troubleshooting those CRT type. This monitor came in with no power symptom. If you are first time repairing this type of power supply, I recommend you to first remove the switch mode power transformer. Then test every single component in the primary section, before you continue to check the secondary section.


You have to be good in testing basic electronic components in order to detect the fault. You can always browse through my website just in case you do not know how to test basic electronic components. If you do not know the right way to check, you might miss out a bad component and this will lead you not able to solve the problem. After carefully checking all the components in the power supply section, I found the filter capacitor do not have any reading using digital capacitance meter (open) , the two round type fuse also open circuit, 1N4744 15 Volt zener diode short circuit and lastly the power IC TOP247F blown!.


Testing the SMPS (switch mode power supply) primary winding with a **** smith fly-back tester, shows green bar which indicates good winding. What we left here were the secondary diode and filter capacitor. Upon checking them with analog meter and ESR meter, found all of them to be good condition. Other area like main board and inverter board also looks okay (Power failure rarely affect these two circuit). Now we have confirmed that only five components found to be faulty.


One by one the components were replaced (except one fuse) and just before you switch on the power supply, make sure you connect a 100 watt light bulb across the live ac line. Once it is done you can then proceed to switch on the LCD monitor to look at the brightness of the bulb.

If it very bright, this suggests that there are still short circuit somewhere in the power section. If it dim or totally goes off, you can now place your red probe to the secondary side to check if any dc present at their respective line. If there are DC voltages present at the output, you can switch off the power, discharge the filter capacitor (for safety purposes), remove the light bulb and connect back the new fuse to its original location.


You are now hundred percent sure that the LCD power supply won

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HCL HCM780M CIRCUIT DIAGRAM


SIR..., regarding monitor...display block characteristics which is operated manually by buttons situated bottom of monitor is anytime coming at the centre of monitor display... The settings block comes on suddenly and we are unable to exit from the same sometimes the block goes off without any action and everything is fine till it is back again and it is come again and again.....by all this i did'nt work on my PC...all result it's useles......please sir giving your suggestion as soon as possible....... This has been happening for the last 1 year and is a real pain Please send some solution

Jan 23, 2009 | Computers & Internet

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Ccfl inverter board


The most prevalent failure on these boards are the transformers and or the ic that controls the frequency of the lamp drive. More times than not you will find a bad transformer.
srich

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