Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Computer Displays
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 05-03-2017, 07:55 AM   #1
pauldow
Member
 
Join Date: Oct 2012
City & State: CT
My Country: US
I'm a: Knowledge Seeker
Posts: 51
Default Auria EQ276W - Looking for Replacement LED Driver

Another dump find.

The screen resolution is 2560 X 1440, so it would be nice to get this working. I read it uses the same panel an an iMac.

The LED backlight driver board has a blown capacitor, however before it went, it looks like it got very hot. PC board traces are burnt, and even into the board surface.

I tried cleaning some of the burnt stuff, and replaced all the capacitors. I also added that jumper to an area that looked like the board copper was toasted. No luck

I'm not sure how many layers the PC board has, so I'm thinking it's too far gone. I tried looking for a replacement, but haven't been able to find one. I did a general search for the board. Also looked on eBay, Amazon and Shopjimmy. The part number on the back is HQ-LED28-1B.

Does anyone have any other places I could find this?

Thanks,
Paul
Attached Images
File Type: jpg IMG_20170503_082926[1].jpg (213.1 KB, 51 views)
pauldow is offline   Reply With Quote
Old 05-03-2017, 10:41 AM   #2
budm
Badcaps Veteran
 
budm's Avatar
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 36,206
Default Re: Auria EQ276W - Looking for Replacement LED Driver

You may have bad LED wiring or some shorted out LED in the LED strings so they need to be checked. The board has 3 LED driver circuits thus 3 Boost converter circuit.
Zyglobal P/N HQ-LED28-1B, it is REV_B.
__________________
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809

Last edited by budm; 05-03-2017 at 10:57 AM..
budm is online now   Reply With Quote
Old 05-10-2017, 07:51 PM   #3
RJARRRPCGP
Badcaps Veteran
 
Join Date: Jul 2004
City & State: North Springfield, Vermont
My Country: USA
Line Voltage: 123-127V 61.5-63.5 Hz
I'm a: Knowledge Seeker
Posts: 4,745
Default Re: Auria EQ276W - Looking for Replacement LED Driver

"02" on the caps, WTF LOL.
__________________
Asus P6T6 WS Revolution

Core i7 Extreme "Bloomfield" 965

Asus Strix GeForce GTX 970

Windows 7 SP1

SoundBlaster ZXR

Corsair TX850M PSU

Looks like I have a laptop that kills a desktop PC!

Received on November 4, 2019:
MSI GF63 Thin 9SC-649US


"There's nothing more unattractive than a chick smoking a cigarette" -Topcat

"Don't eat yellow snow!" -Salem

"did I see a chair fly? I think I did! Time for popcorn!" -ratdude747
RJARRRPCGP is offline   Reply With Quote
Old 05-11-2017, 10:31 AM   #4
jetadm123
Badcaps Veteran
 
Join Date: Feb 2010
City & State: California
Posts: 2,156
Default Re: Auria EQ276W - Looking for Replacement LED Driver

Have you tried checking the mosfet Q3 and diode D3 for shorts?
jetadm123 is offline   Reply With Quote
Old 10-15-2018, 09:12 AM   #5
jackyl
New Member
 
Join Date: Oct 2018
City & State: Chantilly, VA
My Country: US
I'm a: Knowledge Seeker
Posts: 10
Default Re: Auria EQ276W - Looking for Replacement LED Driver

Quote:
Originally Posted by pauldow View Post
Another dump find.

The screen resolution is 2560 X 1440, so it would be nice to get this working. I read it uses the same panel an an iMac.

The LED backlight driver board has a blown capacitor, however before it went, it looks like it got very hot. PC board traces are burnt, and even into the board surface.

I tried cleaning some of the burnt stuff, and replaced all the capacitors. I also added that jumper to an area that looked like the board copper was toasted. No luck

I'm not sure how many layers the PC board has, so I'm thinking it's too far gone. I tried looking for a replacement, but haven't been able to find one. I did a general search for the board. Also looked on eBay, Amazon and Shopjimmy. The part number on the back is HQ-LED28-1B.

Does anyone have any other places I could find this?

Thanks,
Paul
Were you ever able to either fix the original board or find a replacement? I have the same monitor with the same problem. The only difference is that the middle capacitor is the one that blew, but the damage to the board is similar to the pic you posted. Just wondering if you ever found a solution... I hate to trash the monitor but I can't find a board. Thanks.
jackyl is offline   Reply With Quote
Old 10-15-2018, 12:52 PM   #6
Andrew F. Ali
Badcaps Veteran
 
Andrew F. Ali's Avatar
 
Join Date: Jan 2014
City & State: Point Fortin
My Country: Trinidad & Tobago
Line Voltage: 125VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,418
Default Re: Auria EQ276W - Looking for Replacement LED Driver

How many strips and how many LEDs per strip do you have? There are a lot of Chinese made LED Drivers on e-bay, I have used and have had no problem thus far. Most of the LED Drivers I had to use needed an additional DC-DC Converter to bring 12 V to 24V
Andrew F. Ali is offline   Reply With Quote
Old 10-15-2018, 01:15 PM   #7
jackyl
New Member
 
Join Date: Oct 2018
City & State: Chantilly, VA
My Country: US
I'm a: Knowledge Seeker
Posts: 10
Default Re: Auria EQ276W - Looking for Replacement LED Driver

Sorry, I'm a little out of my element when it come to this, so I'm not sure about the number of strips and leds/strip. It's an Auria EQ276W monitor (2560x1440) and the attached file shows the board and failed capacitor.

Thanks.
Attached Images
File Type: jpg UTB8iVQDDhHEXKJk43Jeq6yeeXXav.jpg (192.0 KB, 27 views)
jackyl is offline   Reply With Quote
Old 10-16-2018, 03:19 PM   #8
Chungalin
Badcaps Veteran
 
Chungalin's Avatar
 
Join Date: Jul 2014
City & State: Menorca
My Country: Spain
Line Voltage: 230V 50Hz
I'm a: Professional Tech
Posts: 306
Default Re: Auria EQ276W - Looking for Replacement LED Driver

I don’t see any blown capacitor in either case. Looks to me that glue that keeps capacitors in place has played a bad joke to the circuit, as it has been pointed many times in this forum.
Chungalin is offline   Reply With Quote
Old 10-16-2018, 03:31 PM   #9
jackyl
New Member
 
Join Date: Oct 2018
City & State: Chantilly, VA
My Country: US
I'm a: Knowledge Seeker
Posts: 10
Default Re: Auria EQ276W - Looking for Replacement LED Driver

Quote:
Originally Posted by Chungalin View Post
I donít see any blown capacitor in either case. Looks to me that glue that keeps capacitors in place has played a bad joke to the circuit, as it has been pointed many times in this forum.
ok... the underside of the capacitor appeared to be compromised, but again, all I was trying to do is find out if I could find a replacement board since repairing this one looked futile.
jackyl is offline   Reply With Quote
Old 10-17-2018, 08:04 AM   #10
Andrew F. Ali
Badcaps Veteran
 
Andrew F. Ali's Avatar
 
Join Date: Jan 2014
City & State: Point Fortin
My Country: Trinidad & Tobago
Line Voltage: 125VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,418
Default Re: Auria EQ276W - Looking for Replacement LED Driver

Can you determine on the board the VCC, ON/OFF, GND and P-DIM pins? If so I may be able to recommend a substitute that works for me.
Andrew F. Ali is offline   Reply With Quote
Old 10-17-2018, 03:11 PM   #11
budm
Badcaps Veteran
 
budm's Avatar
 
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 36,206
Default Re: Auria EQ276W - Looking for Replacement LED Driver

https://www.yoycart.com/Product/537007292151/
If you want to go that route, and just remove the bad glue first.
Just search for 'HQ-LED28-1B'

Last edited by budm; 10-17-2018 at 03:23 PM..
budm is online now   Reply With Quote
Old 10-17-2018, 03:16 PM   #12
Andrew F. Ali
Badcaps Veteran
 
Andrew F. Ali's Avatar
 
Join Date: Jan 2014
City & State: Point Fortin
My Country: Trinidad & Tobago
Line Voltage: 125VAC 60Hz
I'm a: Knowledge Seeker
Posts: 2,418
Default Re: Auria EQ276W - Looking for Replacement LED Driver

+1k
That will work. It almost looks like, if not an exact replacement.
Andrew F. Ali is offline   Reply With Quote
Old 11-14-2018, 07:51 PM   #13
Terrh
New Member
 
Join Date: Dec 2012
City & State: Windsor, Ontario
My Country: Canada
I'm a: Knowledge Seeker
Posts: 12
Default Re: Auria EQ276W - Looking for Replacement LED Driver

Did this ever work for anyone?

I have the same monitor, same problem. Replaced the caps, it worked fine for about 3 days and then died again. Entire driver board looks shot.
Terrh is offline   Reply With Quote
Old 11-16-2018, 04:21 PM   #14
Terrh
New Member
 
Join Date: Dec 2012
City & State: Windsor, Ontario
My Country: Canada
I'm a: Knowledge Seeker
Posts: 12
Default Re: Auria EQ276W - Looking for Replacement LED Driver

Bump? Nobody's bought this board and had it work?
Terrh is offline   Reply With Quote
Old 12-20-2018, 01:27 PM   #15
jackyl
New Member
 
Join Date: Oct 2018
City & State: Chantilly, VA
My Country: US
I'm a: Knowledge Seeker
Posts: 10
Default Re: Auria EQ276W - Looking for Replacement LED Driver

I never got an email telling me there were replies to this thread, so I never came back. Ironically, this thread came up in a search. I am planning on buying the board from the link in the previous post. One question though, what's the problem with the glue and what's the best way to remove it? Just scrape it off or does it need to be heated?

I guess I can practice on the old board since it's trash anyway, but does the glue need to be replaced with something else or can the caps just sit freely?

Last edited by jackyl; 12-20-2018 at 01:46 PM..
jackyl is offline   Reply With Quote
Old 12-24-2018, 12:11 PM   #16
jackyl
New Member
 
Join Date: Oct 2018
City & State: Chantilly, VA
My Country: US
I'm a: Knowledge Seeker
Posts: 10
Default Re: Auria EQ276W - Looking for Replacement LED Driver

I ordered one of the boards but today I got an email saying they were out of stock. I think it might be time to take the monitor to the range...
jackyl is offline   Reply With Quote
Old 12-24-2018, 11:07 PM   #17
RJARRRPCGP
Badcaps Veteran
 
Join Date: Jul 2004
City & State: North Springfield, Vermont
My Country: USA
Line Voltage: 123-127V 61.5-63.5 Hz
I'm a: Knowledge Seeker
Posts: 4,745
Default Re: Auria EQ276W - Looking for Replacement LED Driver

Quote:
Originally Posted by jackyl View Post
I ordered one of the boards but today I got an email saying they were out of stock. I think it might be time to take the monitor to the range...
That sucks. That is a bad sign, with an OOS error! For the name of Jesus, I think there are LCD monitors from the socket 775-period that could outlast those suckers! If not easily!

On December 26, 2015, when it was mild, IIRC, there was a shop just down Main St. that had a used Samsung TN monitor from the socket 775 period and it still was working like brand new! Even though I don't know if the CCFLs or the like, got changed or not. It was intended to be gaming-grade, with 2 ms advertised on it, IIRC.

Last edited by RJARRRPCGP; 12-24-2018 at 11:23 PM..
RJARRRPCGP is offline   Reply With Quote
Old 12-24-2018, 11:26 PM   #18
jackyl
New Member
 
Join Date: Oct 2018
City & State: Chantilly, VA
My Country: US
I'm a: Knowledge Seeker
Posts: 10
Default Re: Auria EQ276W - Looking for Replacement LED Driver

I did find a few other suppliers on that same website that supposedly have the same board, so I'll probably try one of them before I truly give up. I'll most likely wait until the first purchase has been credited back, but I'll post an update here if I actually find a board.
jackyl is offline   Reply With Quote
Old 01-04-2019, 11:49 AM   #19
Terrh
New Member
 
Join Date: Dec 2012
City & State: Windsor, Ontario
My Country: Canada
I'm a: Knowledge Seeker
Posts: 12
Default Re: Auria EQ276W - Looking for Replacement LED Driver

okay, I was worried about that. I've had mine for a long time and really love the monitor. I don't mind spending 20 or even 40 bucks to fix it, but beyond that it's probably not worthwile with nice monitors getting down to the $150 range now.
Terrh is offline   Reply With Quote
Old 01-05-2019, 01:28 AM   #20
momaka
Badcaps Veteran
 
momaka's Avatar
 
Join Date: May 2008
City & State: VA (NoVA)
My Country: U.S.A.
Line Voltage: 120 VAC, 60 Hz
I'm a: Hobbyist Tech
Posts: 9,058
Default Re: Auria EQ276W - Looking for Replacement LED Driver

Quote:
Originally Posted by jackyl View Post
I guess I can practice on the old board since it's trash anyway, but does the glue need to be replaced with something else or can the caps just sit freely?
No need to replace the glue. It was put there simply to prevent the caps from moving while being soldered at the factory and also helps protect them during shipping of the monitor. (A hard drop can make them pull out of their leads).

That said, also scrape away all the black sooth that has burned from that board. Then wipe with IPA. You might have to do this several times until you see a somewhat less charred PCB underneath. The black sooth can be conductive, so that's why it needs to be cleaned.

You may also have a burned MOSFET and diode. Possibly a controller too. Not an easy fix if you don't have much tools and you've never done any soldering before. But not that hard if you have soldered at least a few times before.
momaka is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums © 2003 - 2019
Powered by vBulletin ®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 06:33 PM.
Did you find this forum helpful?