Re: Dell 2408WFPb / 2408WFP - No Power
Try heating the central heat sink with a hair dryer. Once it is nice and hot, pull the power cord, count to 3, replace the power cord and turn on with the power button. This usually works for me. (I have done this successfully with the case on, but is easier with the case off.)...
dbrubeck
New Member
Last Activity: 12-15-2018, 06:13 PM
Joined: 11-03-2017
Location: Pleasanton, CA
-
Re: Dell 2408WFPb / 2408WFP - No Power
Thanks Ewrin, this was my exact problem.
By heating the big chip on the logic board to around 125 F (by blowing heat onto the heatsink, and measuring with an IR thermometer), I was able to get the monitor to turn on normally. After the chip cooled down, it would not turn on. Same results on repeat.
I expect that by leaving the monitor in standby, there will be enough heat generated to keep this chip warm and therefore allow the monitor to function indefinitely.
If the monitor gets...Leave a comment:
-
Re: Dell 2408WFPb will not power up
All,
From carefully reading the other thread, I was able to narrow down the problem.
[url]https://www.badcaps.net/forum/showpost.php?p=732018&postcount=34[/url]
By heating the big chip on the logic board to around 125 degrees (by blowing heat onto the heatsink, and measuring with an IR thermometer), I was able to get the monitor to turn on normally. After the chip cooled down, it would not turn on.
I expect that by leaving the monitor in standby, there will be enough heat generated to keep this...Leave a comment:
-
Re: Dell 2408WFPb will not power up
I'd like to narrow down the problem by ruling in or out the power supply board (with the big brown cap). I plugged in the power, then measured the voltages on the outbound power cable (upper right on the power board photo). Power light will not turn on, but I got:
Black to
Brown 0
Red 23.5 DC
Orange 0
Yellow 23.5 DC
Green 23.5 DC
Blue 0
Purple 0
Grey 0
Does anyone know if this indicates whether the power supply is working?
I'm thinking the next...Leave a comment:
-
Re: Dell 2408WFPb will not power up
Roberto, thanks for the idea. Did you reflow the power supply board with the big brown cap, or the next board with the video input jacks? I might try this....Leave a comment:
-
Re: Dell 2408WFPb will not power up
Looking at the brown cap carefully, I don't see any bulging or leaking at either end, so I don't see any evidence that it is the problem....Leave a comment:
-
Dell 2408WFPb will not power up
Hi,
I have a Dell 2408WFPb which has worked for years, but after moving it to a new location, it will no longer power up. (A couple of weeks ago it also didn't power up but eventually worked after a few tries.)
None of the capacitors or other components appear damaged.
I have posted photos of the power input board and power supply board:
[url]https://www.dropbox.com/sh/bff8p2cqbfi70l7/AAChK3miH-o24dNivEc1JZjya?dl=0[/url]
Some measurements with a multimeter:
power input board:
fuse F601 - good continuity... -
Re: New Members - please post your introductions here
Hi, I'm a software engineer and have built some simple digital circuits. I have a multimeter and understand the basic function of various components, but am not an expert.
I did manage to replace a cap on my refrigerator control board which saved $1000.
My Dell 2408wfp refuses to turn on so am looking to troubleshoot and fix it if is not too complicated. Can't see any obvious problems. Will post photos in one of the 2408wfp threads.
Thanks!Leave a comment:
No activity results to display
Leave a comment: