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 02-15-2006, 11:48 PM   #1
aceshigh
New Member
 
Join Date: Feb 2006
Posts: 7
Default Dell 1505fp dead

Anybody had any experience with Dell 1505fp lcd monitors? I have one that's dead to the world.No lights, nada. It has one of those integrated power supply/inverter boards. I checked most of the caps on both the controller and the power supply and I didn't find anything bad. Some of those small can smt caps on the controller had between 3-5 ohms esr but still rang good on my sencore lc103.All other cap function tests showed good. They are no blown fuses. Does anyone have any input? I don't have any experience with lcd's other than changing ccfl's once in a while. Thanks guys

aceshigh is offline   Reply With Quote
Old 02-18-2006, 02:19 PM   #2
willawake
Super Modulator
 
willawake's Avatar
 
Join Date: Nov 2003
City & State: Αθήνα
Posts: 8,006
Default Re: Dell 1505fp dead

bump! where is KC8?
__________________
capacitor lab yachtmati techmati
willawake is offline   Reply With Quote
Old 02-18-2006, 02:27 PM   #3
kc8adu
Super Moderator
 
kc8adu's Avatar
 
Join Date: Nov 2003
City & State: dayton ohio
My Country: U.S.A!
Line Voltage: 12vdc,120/240vac,480vac 3ph on my bench
I'm a: Professional Tech
Posts: 8,268
Default Re: Dell 1505fp dead

post a pic.
is that the one with the ice2as someting chip and a shorted mosfet?
if so its a pattern failure due to a bad batch of chips.
kc8adu is offline   Reply With Quote
Old 02-18-2006, 10:31 PM   #4
arneson
Badcaps Veteran
 
Join Date: Sep 2005
City & State: SWF
Posts: 1,258
Default Re: Dell 1505fp dead

I have pattern baldness and a short fuse,
but my caps are still good.
__________________
Jim
arneson is offline   Reply With Quote
Old 02-20-2006, 04:57 PM   #5
aceshigh
New Member
 
Join Date: Feb 2006
Posts: 7
Default Re: Dell 1505fp dead

Kc8 thanks for the reply, here are some pics. Didn't find any Ice2as01 ic's.
Attached Images
File Type: jpg 1505fp1.JPG (94.4 KB, 176 views)
File Type: jpg PTB-1517.JPG (76.6 KB, 189 views)
File Type: jpg PTB-1519.JPG (99.8 KB, 168 views)
aceshigh is offline   Reply With Quote
Old 02-24-2006, 09:51 AM   #6
aceshigh
New Member
 
Join Date: Feb 2006
Posts: 7
Default Re: Dell 1505fp dead

Also didn't find anything shorted. Kc8 are you there? I hope those aren't crickets I hear.
aceshigh is offline   Reply With Quote
Old 03-06-2006, 11:17 PM   #7
aceshigh
New Member
 
Join Date: Feb 2006
Posts: 7
Default Re: Dell 1505fp dead

Is this thread dead?
aceshigh is offline   Reply With Quote
Old 03-07-2006, 01:42 AM   #8
Decade
Member
 
Decade's Avatar
 
Join Date: Dec 2005
City & State: Sweden
Posts: 36
Default Re: Dell 1505fp dead

Hi aceshigh!

Are there any voltages at all out from the psu, backlight?
Have you managed to find out which pin is the PSU,s on/off if so check for any dc at the secondary side if not hook up the scope and check for any start up pulses, had one lcd monitor which was dead found out that as soon as a load was connected to the psu the output voltage dropped to nearly zero a optocoupler was the culprit, don't recal the brand.
What kind of switcher does your psu use?
Decade 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 01:57 PM.
Did you find this forum helpful?