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 03-18-2009, 01:20 AM   #1
samnabass
New Member
 
Join Date: Feb 2009
Posts: 3
Default Planar PL1910M LCD will not power on

Hi to all.
This monitor has been driving me nuts for the past two days and I just can’t figure it out so i came in for some help.
The main problem is the monitor will not turn on just a flashing LED on the ON button.
The back lights were checked to be OK
All the caps checked ok with and ESR Tester.
All the diodes checked OK – Desolder one leg and test with a smart tweezers.
MOSFET Tested Ok.
Resolder all the joints on the back side.
And still no go – so I figured maybe I should try to power it from an external power adapter but there are no marking on the board to which pen is which. So I plugged in a couple of extra back lights to the board. Flipped it upside down and fired it up and start poking the bins I found the +5V / +12 / Ground / On / Of while doing that I accidentally jumped the pins marked on the attached image A&B and the back lights come on and stayed on – tried to trace the connectors to the Video board but that’s almost impassible.
All the caps on the video board checked ok too.
Any ideas ???
Attached Images
File Type: jpg plan_1.jpg (98.6 KB, 110 views)
File Type: jpg plan_11.jpg (134.8 KB, 82 views)
File Type: jpg plan_111.jpg (131.9 KB, 55 views)
File Type: jpg plan_1111.jpg (91.4 KB, 60 views)
samnabass is offline   Reply With Quote
Old 03-18-2009, 04:16 PM   #2
mladen82
Member
 
Join Date: Mar 2009
City & State: Podgorica
My Country: Montenegro
Line Voltage: 220V 50Hz
I'm a: Professional Tech
Posts: 39
Default Re: Planar PL1910M LCD will not power on

if dc voltages +5V and +12V are fine and if are regulated voltages on main a/d board (3.3V or 1.8V probably) are fine too, problem is probably in mcu (or his eeprom) as led flashing, however check for possible shorts (smd capacitors) on main board or even shorts towards lcd panel electronics

Last edited by mladen82; 03-18-2009 at 04:20 PM..
mladen82 is offline   Reply With Quote
Old 03-19-2009, 09:12 PM   #3
samnabass
New Member
 
Join Date: Feb 2009
Posts: 3
Default Re: Planar PL1910M LCD will not power on

Hi, Thanks for the info - i did check as much as i can with no luck - i spend too much time on this board and i think it's time for it to be recycled.

Take Care.
samnabass is offline   Reply With Quote
Old 03-20-2009, 09:17 AM   #4
EGuevarae
Badcaps Veteran
 
EGuevarae's Avatar
 
Join Date: Nov 2008
City & State: Chiriaco Summit, CA - near the AZ-CA Border
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Hobbyist Tech
Posts: 1,308
Post Re: Planar PL1910M LCD will not power on

Quote:
Originally Posted by samnabass
Hi to all.
This monitor has been driving me nuts for the past two days and I just can’t figure it out so i came in for some help.
The main problem is the monitor will not turn on just a flashing LED on the ON button.
The back lights were checked to be OK
All the caps checked ok with and ESR Tester.
All the diodes checked OK – Desolder one leg and test with a smart tweezers.
MOSFET Tested Ok.
Resolder all the joints on the back side.
And still no go – so I figured maybe I should try to power it from an external power adapter but there are no marking on the board to which pen is which. So I plugged in a couple of extra back lights to the board. Flipped it upside down and fired it up and start poking the bins I found the +5V / +12 / Ground / On / Of while doing that I accidentally jumped the pins marked on the attached image A&B and the back lights come on and stayed on – tried to trace the connectors to the Video board but that’s almost impassible.
All the caps on the video board checked ok too.
Any ideas ???
Looks more like a Hanns-G than a Planar.... look at this thread : http://www.badcaps.net/forum/showthread.php?t=6695
Did you check the LCD without the LCD connected to the VBoard to see how the power LED behaves?
__________________
There are 10 kind of people in this world: those that understand binary, and those who don't.
  • ASUS ROG Maximus IX Code
  • Intel Core i5-7600K 3.8GHz
  • 16gb GSKILL TridentZ RGB DDR4-3200
  • 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
  • Windows 10 Pro x64
  • GeForce GT1050
    2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )
EGuevarae is offline   Reply With Quote
Old 10-08-2009, 03:59 PM   #5
stneargd
New Member
 
Join Date: Apr 2008
City & State: Ohio
Posts: 1
Talking Re: Planar PL1910M LCD will not power on

If the led is flashing green and amber, the unit needs reset. I have purchased 3 of these units with this issue and all worked after resetting.

Here is the link to the reset procedure:
http://marsbox.com/blog/howtos/plana...d-monitor-fix/
stneargd is offline   Reply With Quote
Old 11-19-2009, 11:47 PM   #6
pfjoe
New Member
 
Join Date: Nov 2009
Posts: 1
Default Re: Planar PL1910M LCD will not power on

strneargd ... you are my new hero ... thanks!!!
pfjoe is offline   Reply With Quote
Old 10-06-2010, 08:00 PM   #7
sceva
Senior Member
 
Join Date: Feb 2010
City & State: Omaha, NE
Posts: 162
Default Re: Planar PL1910M LCD will not power on

Quote:
Originally Posted by stneargd View Post
If the led is flashing green and amber, the unit needs reset. I have purchased 3 of these units with this issue and all worked after resetting.

Here is the link to the reset procedure:
http://marsbox.com/blog/howtos/plana...d-monitor-fix/
I just fixed a Planar PL1911M with the same problem!! Thanks for the link.
sceva is offline   Reply With Quote
Old 03-01-2011, 02:40 PM   #8
DigitalStone
Member
 
Join Date: Jan 2011
Posts: 31
Default Re: Planar PL1910M LCD will not power on

Quote:
Originally Posted by sceva View Post
I just fixed a Planar PL1911M with the same problem!! Thanks for the link.
Same here. Thanks for the link. Wish I had found this before I took it apart.
Works great now.
DigitalStone is offline   Reply With Quote
Old 01-11-2012, 06:51 PM   #9
jfarrell
New Member
 
Join Date: Feb 2011
Posts: 2
Default Re: Planar PL1910M LCD will not power on

OK so this planar was fixed with a reset...amazing....
now my question is...
How many other monitors allow a similar reset, to get them going again.
( is planar the lone dog? )
jfarrell 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 03:09 AM.
Did you find this forum helpful?