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Forum: Troubleshooting Computer Displays 02-07-2015, 08:44 AM
Replies: 4
Views: 2,927
Posted By bicycle6228
Re: Dell 2407 wfpb no backlight

PlumBum- Did you get your 2407 Inverter board working?
Forum: Troubleshooting Computer Displays 02-07-2015, 08:39 AM
Replies: 553
Views: 292,385
Posted By bicycle6228
Re: Dell 2407WFPb Monitor - Bad Cap

I can see in your 3rd photo that R670 is burnt, and it's just out of view, but it looks like C605 has the usual chemical leakage at it's negative lead. In all, there will be about 8 to 10 components...
Forum: Troubleshooting Computer Displays 07-31-2013, 08:18 AM
Replies: 11
Views: 8,617
Posted By bicycle6228
Re: Dell 2405FPW power supply fault.

300VDC, measured across C605's terminals, with the monitor actively in display, not in standby.
Forum: Troubleshooting Computer Displays 07-30-2013, 07:51 PM
Replies: 11
Views: 8,617
Posted By bicycle6228
Re: Dell 2405FPW power supply fault.

Forgot the schematic. Attached, but it's for the very similar 2407WFPb. There are some differences, such as R674, which is 8.25K in a 2407, but 11.3K in a 2405.
Forum: Troubleshooting Computer Displays 07-30-2013, 07:46 PM
Replies: 11
Views: 8,617
Posted By bicycle6228
Re: Dell 2405FPW power supply fault.

C702, C711, C712, C713, C714, C715: All 6 of these capacitors are 470uf, 35V, 105C.
D701, D702, D703: YG865C15
D704: YG802C10
These capacitors fail frequently, and also C605 (120uf, 450v, 105C)...
Forum: Troubleshooting Computer Displays 07-08-2013, 04:49 PM
Replies: 7
Views: 4,677
Posted By bicycle6228
Re: Samsung 2433BW: 2 seconds til black

Victory. Like Ken256, I've never experienced a bad HV transformer on an inverter board, until now. I got a replacement on eBay and was encouraged right away: both secondary windings measured 1050...
Forum: Troubleshooting Computer Displays 06-29-2013, 10:17 PM
Replies: 7
Views: 4,677
Posted By bicycle6228
Samsung 2433BW: 2 seconds til black

I have exhausted the resources here and elsewhere to the best of my ability.
Observations, then what I've tried:
Observations:
1) There are 4 CCFL's attached via two connectors: CN301 & CN304. It...
Forum: Troubleshooting Computer Displays 06-07-2013, 04:46 PM
Replies: 28
Views: 12,975
Posted By bicycle6228
Re: Dell 2408WFPb / 2408WFP - 7 seconds to black

On a known-good, working 2408WFPb Inverter board I have, I'm measuring about 55KOhms across R015, in circuit, both polarities. I also have wondered about the purpose of the mystery 2-pin connector...
Forum: Troubleshooting Computer Displays 01-27-2013, 06:35 PM
Replies: 94
Views: 36,045
Posted By bicycle6228
Re: Dell 2408WFPb / 2408WFP - No Power

>Did you check every component to get to that one or ...
There was nothing obviously wrong via visual or resistance checks, and I could hear the ticking in T601, so I guessed the SMPS was trying to...
Forum: Troubleshooting Computer Displays 01-27-2013, 11:30 AM
Replies: 94
Views: 36,045
Posted By bicycle6228
Re: Dell 2408WFPb / 2408WFP - No Power

Replacing the shunt regulator, IC701 in the attached schematic, fixed my Dell 2408WFPb power supply.
Forum: Troubleshooting Computer Displays 12-22-2012, 12:30 PM
Replies: 94
Views: 36,045
Posted By bicycle6228
Re: Dell 2408WFPb / 2408WFP - No Power

Ritalin:
I have a 2408WFP with the same no power issue, no bulged caps, shorted semi-conductors, burned components and nothing out of the ordinary.
What did you do to resolve your issue?
...
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