Re: HP DPS-340CB A - lots of smoke!
NICE WORK!!! I would have just decided that it was daqmaged beyond repair and thrown it out.
NICE WORK!!! I would have just decided that it was daqmaged beyond repair and thrown it out.
-
I love putting bad caps and flat batteries in fire and watching them explode!!
No wonder it doesn't work! You installed the jumper wires backwards
Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium
Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 Pro -
Re: HP DPS-340CB A - lots of smoke!
I agree. A lot of people would probably think that this repair was impossible. As usual, great job everell! I really admire your work, especially the PCB fix.Comment
-
Re: HP DPS-340CB A - lots of smoke!
Yes, it was a challenging project. I hope it will inspire some new ideas and creative thinking.
I talked with the guy I got it from. He said it had been used on a computer that ran 24/7. He said his customer came in one morning to a room full of smoke - the computer was still on. I think the capacitor across the bridge diodes had a lot to do with this failure - so unusual. Also the two coils burned differently. One of the coils was making contact with the capacitor that failed.
I added some silicone to keep the coils more stationary, and to keep the new capacitor from touching the coils. Final reassembly and this project will be over.Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
-
Re: HP DPS-340CB A - lots of smoke!
Good day, everell!
In time for my cookie break, I was comparing the original and restored condition, the former blue film capacitor sure did big damage. But it should be 1uf or less only.
I did some work reviving my delta dps300kb from blown varistor, from my own folly years back. With some reading from the knowledgable posts in the forum, I did managed to get them back and running.
Lol, now I killed another old one, but I take a week break or scrap it :p
Keep it up! work is good.Comment
-
Re: HP DPS-340CB A - lots of smoke!
Good morning Chaoz. Just out of curiosity, where are you from?
Another of my interesting projects from last November is the thread titled "Powerman resurrected" The 5vsb transformer was shorted and lots of parts blown. Couldn't find a replacement transformer, so this project shows what you can do to fix it anyway. Just do a search in this Power Supply section for Powerman and you will find it.Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
-
Re: HP DPS-340CB A - lots of smoke!
LOL! I am on the other side of earth
I read your thread on the powerman, great job again. Wish I have the patience and knowledge of yours.
I was cleaning out my cupboard these few weeks, big load of dead pc parts!
I was trying to do some work on my old epox 8rga. Spent hours reading and doing transistor/IC transfer, but the southbridge is still dead. typical nf2 self destruct.
There is another abit nf7 but it cant post.
may be a bad memory mosfet or controller IC. I need a 100x magnifier to read these...
Cross my fingers
Comment
-
Re: HP DPS-340CB A - lots of smoke!
Hello,
Good job!!!
I exactly have the same kind off PSU, but in 410W, both borads are same, in my case nothing was burn but no output, evenif i have more than 300V cc on the first card...
Do you have a schematic of this PSU ?
Thank youComment
-
Re: HP DPS-340CB A - lots of smoke!
On May 8, 2010, I remember there being a surprise T-storm to the north, in Springfield, Vermont, with hail, possibly a storm system that was related southward and westward.
The next day, on May 9, 2010, the daytime temp was way below normal and was windy up here.Last edited by RJARRRPCGP; 04-25-2020, 01:16 PM.ASRock B550 PG Velocita
Ryzen 9 "Vermeer" 5900X
32 GB G.Skill RipJaws V F4-3200C16D-32GVR
Arc A770 16 GB
eVGA Supernova G3 750W
Western Digital Black SN850 1TB NVMe SSD
Alienware AW3423DWF OLED
"¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr!" -Mí mismo
"There's nothing more unattractive than a chick smoking a cigarette" -Topcat
"Today's lesson in pissivity comes in the form of a ziplock baggie full of GPU extension brackets & hardware that for the last ~3 years have been on my bench, always in my way, getting moved around constantly....and yesterday I found myself in need of them....and the bastards are now nowhere to be found! Motherfracker!!" -Topcat
"did I see a chair fly? I think I did! Time for popcorn!" -ratdude747Comment
-
hi
my neighbor gave me an old radio shack trs80 model3 computer...it was stored in his attic for 35yrs...i powered it on and after 5min lots of smoke was coming out of computer...i took it apart and didnt notice any fire evidence so i assume a cap split open...i looked around only saw 1 suspect part...see photo...could this be the smoke? -
Hi to all, I was diagnosing 2 smoke detectors that experienced power surge. I opened one up and found a weird fuse/resistor, which now has open circuit. I can't find this part.
Forgot to mention they both light up and I believe the test function works, but when I put smoke to them no alarm!
Any help in this regard would be greatly appreciated.
Thanks,... -
Not sure if this is the best section, so feel free to move it. I'm tasked to get some "safety device" in case something goes wrong to insure a dry sauna does not burn again. This time the wall with stove on it has been covered with mineral insulation material as well as linings. (Harvia states their stove can be mounted directly on wooden walls! get that!
).
Idiots wired extra (UTP, get that second time
) cable to the sauna ceiling. Is there ANY smoke detector which could survive on the ceiling with up to 100 (120?) °C there, or just all those house toys...
-
Hi.
BacCaps forum is awesome - thank YOU ALL for sharing knowledge!
This is about DONG YANG PSU BN44-00195A failiure in Samsung 245BPLUS. It started with bang and smoke from the back of LCD. Downloaded diagram BM44-00192A - a bit different but I will use all parts names from this diagram [and real PSU].
BIG CAP CP801 had 315V, on standby pin 5,2V. After shorting S_B ON (through 3,3k ohm resistor) 24V and 5,3V were missing, on CP801 was 312V.
RM801 [real PSU: RM801 - 0,22 ohm 1W] - FAIL
burned, measured 10M ohm.
QM801 [real PSU:... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
Comment