Re: Dell 3008wfp faulty power supply
I just did a quick re-assemble with 2 new caps and tried to turn on, but the symptoms have not changed. Blue power light is ON, black screen and buttons do nothing.
I have not re-measured voltages yet.
Any suggestions from here?
DSH
Member
Last Activity: 04-02-2024, 09:34 PM
Joined: 12-01-2013
Location: NSW
-
Re: Dell 3008wfp faulty power supply
Great eyes Agent 24.
Yes I also replaced the cap next to Genisis chip. It tested OK but did have a slight bulge. I have tested all other caps of the same brand/rating and ESR indication is OK, with no visual bulging. I am now tempted to replace all caps of the same brand/rating, there is about 10 of them. What do you suggest?Leave a comment:
-
Re: Dell 3008wfp faulty power supply
Agent 24 you have excellent eyes!
The photo you are looking at has quite a bit of glare in it. Only 1 of the caps is actually bulging. My MESR-100 gives a 26 ohm reading on the bulging cap. (CapXon 47uF, 25V) So I will replace that and see if we are good to go. There are lots of other caps with the same brand/rating, but I think I will leave them for now.
All the other caps you highlighted tested good.Leave a comment:
-
Re: Dell 3008wfp faulty power supply
Without the logic board connected, many voltages are out of wack and P802 pin 4 is zero volts. So I think I will have to connect the logic board to test this properly. Does that sound reasonable?Leave a comment:
-
Re: Dell 3008wfp faulty power supply
Now I am getting confused, Pin 4 of P802 actually connects to many of the pins on A358. The resistance is 102Kohms from pin 4 to 5 of the A358 chip pins.Leave a comment:
-
Re: Dell 3008wfp faulty power supply
I traced pin 4 of P802 to R103 and then to the A358 chip via a few more resistors. When viewing the chip print in the correct orientation it is the bottom right pin.
I have added some more pics of the area. Hope that helps....Leave a comment:
-
Re: Dell 3008wfp faulty power supply
I have not noticed any problems with cables at all. Double checked just now and they all look perfect. Here are some more pics of the ICs you requested.
The 2 ICs closest to P802 are labelled FP131 / 7Nc-591 (overcurrent protection)
The IC furthest away is 358A / E2550 (I guess this is AS358)
Any way I can check these?
Cheers
DSH...Leave a comment:
-
Re: Dell 3008wfp faulty power supply
Thanks for your quick reply Agent24,
Here are some snap shots of my boards. I have not taken heat sinks off at this stage because that requires de-soldering. I already did the D22 upgrade and had a good look under that heat sink. All looked A-OK to me.
Cheers
DSH...Leave a comment:
-
Re: Dell 3008wfp faulty power supply
I have used the reverse numbering for P802. That makes a bit more sense.
I have to go to work now will post some photos tonight.Leave a comment:
-
Re: Dell 3008wfp faulty power supply
Hi All,
I have the same symptoms as KK325ic, that is, plug in power and get blue light ON, but nothing else. None of the buttons do anything, the blue light always remains ON. I have read all the great help on this site but not seen any solutions for this particular problem so far. I have the monitor apart and already replaced the D22 (STPS40170CT) but no change to symptoms. The boards all look to be in very good condition to me (I do a lot of electronics repairs). I have measured voltages for the 3 connectors with the T-con and...Leave a comment:
-
Samsung UA46B6000VF LCD Picture problem
Hi all,
This TV is 5 years old and has some picture problems (lines) which I am hoping to solve. Attached are some pics of the problem(s). I have labelled them with a basic description as the problem(s) can vary a bit from initial turn on and after warmup. This warmup behaviour is very repeatable.
I have had the back off and had a good look at all the board components, but cannot see anything suspicious. I have reseated all ribbon cables and cannot get the problem to go away. I am thinking it could be either a bad LCD panel or possibly a bad T-con board. Before I purchase... -
Re: New Members - please post your introductions here
Hi Badcaps,
I have used this site for quite a while, perhaps 2 years or so, and have found it to be really useful. Just today I decided to register so I have full access to all the good stuff.
I'm a Mechanical Engineer and live is Sydney. One of my hobbies is to keep good stuff out of the rubbish dump. I have 3 fast and quiet computers in my home, all built from 90% reclaimed parts. I find it is necessary to buy SSDs, but everything else can be obtained for free.
I have repaired several...Leave a comment:
No activity results to display
Leave a comment: