Question about Hannstar Computer Monitors

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Dc on motherboard is missing, the plug. i could't find a replacement that fit in the board like the first one did, so i found one with the same voltage, but it has to be wired to the board.problom is i cant identifiy the + - and comon.theres just numbers on the board.its a hannstar j mv-4 94v-o motherboard can you get me a diagram of the board? or the definition for 1 , 2, 3, 4, 5, 6.

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  • ceedeekekic Mar 07, 2009

    just need a web site that will give detailed diagram of my motherboard.can u help?

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  • Contributor
  • 26 Answers

On my board it is written next to connector HW191D

Posted on Aug 02, 2014

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  • 155 Answers

SOURCE: Need a new MV-220 inverter board, but cant find it anywhere!

It may be worth a shot, but before you give it a go, I'd scrounge up any info you can on your florescent backlight (power rating, input frequency, ect.) Take it out carefully and see if it has any markings.
Then you can use a multimeter to test the output of the MV176.
If you end up ruining the light you have, you could always try and obtain the MV176's bulb and attempt to install it along with the inverter.

Posted on Mar 21, 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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1 Answer

Loose power piont on my easy note laptop mod no new95


If you are talking about the DC jack in the laptop, it will need to be replaced or repaired, the laptop must be dismantled down to the motherboard level to access the plug.

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I have a Dell 2208WFPt monitor and when power is applied and without pressing the power switch the power light flashes but the display remains blank and dark. I checked the large cap on the power supply...


The replacement board is about $50 (there are three versions), you can try troubleshooting down to components level or replace the board, hopefully is is not bad lamp assemblies (you need to have Inverter test lamp to verify if it is the lamps problem or inverter problem).
http://www.lcdrepair.us/Invpowersupply.html

http://s807.photobucket.com/home/budm/allalbums

What DC voltage do you get feeding the inverter circuits?

Aug 13, 2010 | Dell UltraSharp 2208WFP 22" Widescreen LCD...

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What kind of capacitor does a samsung 906bw lcd monitor use? I saw two bad capacitor at the power supply both are 10v 1000uf (105 degrees C)


There capacitors would most likely be electrolytic type. They are polarized capacitors and used for filtering DC voltage supply to remove the ripply and smooth the DC power.
If you cannot get a 10 volt capacitor then you can use a higher voltage type provided it can fit on the circuit board.

Mar 29, 2010 | Samsung 906BW LCD Monitor

1 Answer

Won't power up. Press power button, turns green then orange.


Good day sir/maam, Hi, If the LCD is under warranty, use it, they will replace the LCD monitor for free. If not, you may need spend for a Power supply board, to repair one.

There are two boards usually found on an LCD monitor, one main board that controls the LCD screen, back light, inverter, controls and sound. the second board is the power supply board, which accepts mains voltages 90v-240v AC and convert them to DC to power the entire monitor.
If however you may bring it to a repair shop or dealer, they will replace the power board, and there you go. the monitor is done.

Nov 24, 2009 | BenQ FP737S-D 17" LCD Monitor

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Flickers until all monitor area turns gray - just like tv without signal


Sounds to me like bad caps on the power board or main board.

The monitor is faulty for sure. Bring it back to the shop and tell them the problem is still happening and ask them to leave it on connected to a computer overnight since it takes a while to happen. They should see it happen and then troubleshoot it further.


May 26, 2009 | HP Compaq FP 7317 17" Flat Panel LCD...

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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

Mar 23, 2009 | Samsung SyncMaster 153V 15" Flat Panel LCD...

1 Answer

Lost ac/dc adapter


Hi, for a 12v 2 ampers device any universal laptop power suply can be used. They usually are tesignedfor about 2-4 ampers so it won't be a problem. All you have to ake soure is the correct polarity, and the changeable dc plug.

good luck.

Mar 20, 2009 | Kogi L7CH Monitor

2 Answers

Monitor comes on but wont show picture


You should make sure the cable is plugged into the video port on the back of the tower. Also, if you have more than one video card, ie an "onboard card" and another card that was added later, try alternating one to the other and see if the other one works. You can identify video ports by finding the blue pentagonal plug. It also will be the only plug that your monitor cable fits into (that is describing a VGA cable, a white cable is a DVI cable and is even easier to identify.) You might also want to make sure the video card wasnt jostled out of place. The final solution could be you have developed some bad memory modules, or the memory was jostled out of its slot during the move.

Jan 03, 2009 | Dell Computer Monitors

2 Answers

Screen is blank.


Could have blown some capacitors inside the monitor.
I just fixed one today that had no power, the blue ring around the power button didn't even light up when plugged in.
I open it and found 3 bulgingcapacitors on the power/inverter board.
They were all 25V 470uF rated capacitors.
Went to radioshack and found 2 35V 470uf, got them at $1.29 each, then I found 1 50V 470uF out of a dc car power adapter for an ipod, it was as close as I could find.
Replaced the 3 broken/bulging ones with the new/salvaged ones, put it back together, plugged it in and the blue light came on when I pushed the power button.
Plugged it in to my laptop with vga cable, and it works great.

Oct 24, 2008 | Samsung SyncMaster 932B LCD Monitor

5 Answers

What voltage is the dc adapter?


You will need at least a 4 amp rated regulated 12 Volt power supply.
These are commercialy available from most electronics parts suppliers.
They come on a circuit board. You can mount it in your own case and
use the original Viewsonic wire end. If you do a google search for 12
volt reglated power supplies you should find many of these.

However, with a second-hand Sprint AC adapter with 3A,
12v adapter, the screen blinks on and off
intermittently. Obviously there is some difference here between a class
2 adapter and a power supply box.

Oct 03, 2008 | ViewSonic VA520 15" Flat Panel LCD Monitor

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