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Search: Posts Made By: Oklahoma Wolf
Forum: Troubleshooting Power Supplies and Power Supply Design 09-29-2013, 04:49 PM
Replies: 25
Views: 5,025
Posted By Oklahoma Wolf
Re: Server power supplies.. uh oh

Should've said something sooner - I don't offer that 90 day warranty for nothing. Expired now by a couple weeks.

I'd just replace the fan and run it some more.
Forum: Troubleshooting Power Supplies and Power Supply Design 09-29-2013, 02:26 PM
Replies: 25
Views: 5,025
Posted By Oklahoma Wolf
Re: Server power supplies.. uh oh

You need to draw the line somewhere... putting junk units inside a customer's server, whether they ask for it or not, is asking for trouble.

I have quite a few old review samples sitting around...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-03-2011, 04:17 PM
Replies: 4
Views: 2,711
Posted By Oklahoma Wolf
Re: Gateway MX8739 - Dead

Yeah, this thing needs a new motherboard. Not sure I'm going to be able to do board level repairs on this one. She's a parts machine now.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-03-2011, 08:56 AM
Replies: 4
Views: 2,711
Posted By Oklahoma Wolf
Re: Gateway MX8739 - Dead

Chipset area is getting about a quarter of a volt. No power to GPU area.
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-03-2011, 08:43 AM
Replies: 4
Views: 2,711
Posted By Oklahoma Wolf
Re: Gateway MX8739 - Dead

Nope - that's glue residue. There apparently used to be a shield on that part of the board - missing on mine, because someone's already been monkeying with it.

Can't find any liquid spill traces...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 03-03-2011, 08:17 AM
Replies: 4
Views: 2,711
Posted By Oklahoma Wolf
Gateway MX8739 - Dead

Picked up this 17" laptop cheap off eBay as a project. I've done about all I can do on it, and have pretty much hit a wall. Thought I'd post here and see if anyone has any ideas.

Symptoms are -...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-18-2010, 01:10 PM
Replies: 158
Views: 30,325
Posted By Oklahoma Wolf
Re: PC Restarting/ Shutting off abruptly.

That's because it has no display for it. It does take it into account. See the actual Brand specs here:

http://www.brandelectronics.com/docs/model4instructions.pdf

I've had it remain accurate...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-18-2010, 10:31 AM
Replies: 158
Views: 30,325
Posted By Oklahoma Wolf
Re: PC Restarting/ Shutting off abruptly.

Sorry, but this is not correct. They both do. I don't test for PF, but that doesn't mean I can't ;)

The units that can actually fool them are few and far between. I've had only two in three years...
Forum: Troubleshooting Computer Displays 06-07-2010, 03:39 PM
Replies: 11
Views: 6,967
Posted By Oklahoma Wolf
Re: Hp Vs17

Well, I think I may be giving up on this one. The replacement for the AP431 helped nothing. A nearby resistor (R824) that was supposed to measure 20k ohms read 34k instead, but replacing it had no...
Forum: Troubleshooting Computer Displays 05-24-2010, 09:30 AM
Replies: 11
Views: 6,967
Posted By Oklahoma Wolf
Re: Hp Vs17

/smacks forehead

Cross referencing... of course! I now have ten LM431's on the way. Will now wait and see what happens when I replace the regulator.

I'm not actually sure this is the PWM...
Forum: Troubleshooting Computer Displays 05-24-2010, 08:29 AM
Replies: 11
Views: 6,967
Posted By Oklahoma Wolf
Re: Hp Vs17

That's what I was afraid of.

Dug a little deeper into the unit. The feedback circuit uses an AP431 shunt regulator, it looks like. Replaced the 4.7uF 50V Capxon attached to it - no change. Ref pin...
Forum: Troubleshooting Computer Displays 05-23-2010, 11:29 PM
Replies: 11
Views: 6,967
Posted By Oklahoma Wolf
Re: Hp Vs17

Hmm... well, the 5V rail has been recapped - it's the only one I even had the replacement caps for. It's still at 6.31V. I've traced it back to D810, an SB1060FCT which in turn connects right to...
Forum: Troubleshooting Computer Displays 05-23-2010, 05:14 PM
Replies: 11
Views: 6,967
Posted By Oklahoma Wolf
Re: Hp Vs17

Some more progress made. As it turned out, I remembered wrong about how the inverter board mounts - it was easy to check the running temp of the components.

Observations - the only chip running...
Forum: Troubleshooting Computer Displays 05-19-2010, 01:06 PM
Replies: 11
Views: 6,967
Posted By Oklahoma Wolf
Re: Hp Vs17

That's what I thought. The topology of this one makes it hard to see what's running hot and what isn't due to short cables between parts. I need to find a way to run it so I can see what's...
Forum: Troubleshooting Computer Displays 05-19-2010, 10:04 AM
Replies: 11
Views: 6,967
Posted By Oklahoma Wolf
Re: Hp Vs17

Nobody has any ideas on this one? I can't decide if this is more likely to be issues with the FAN7601 or the highish 5V supply. This one keeps tying my head into knots when I try to trace anything on...
Forum: Troubleshooting Computer Displays 05-19-2010, 09:58 AM
Replies: 17
Views: 12,441
Posted By Oklahoma Wolf
Re: Half success on AL1716

No problem - that one's got extra bells and whistles, which is why I keep ending up pounding my head on hard surfaces whenever I try to get it fixed. Ah well - I got the last Acer AL1716B fixed......
Forum: Troubleshooting Computer Displays 05-18-2010, 09:06 PM
Replies: 17
Views: 12,441
Posted By Oklahoma Wolf
Re: Half success on AL1716

Yep - it got buried with no responses.

http://www.badcaps.net/forum/showthread.php?t=9599
Forum: Troubleshooting Computer Displays 05-17-2010, 02:42 PM
Replies: 17
Views: 12,441
Posted By Oklahoma Wolf
Re: Half success on AL1716

Just an update. My new LM1117's are here, and U101 has been replaced after a brief fight with my soldering iron.

Monitor #1 is now fully working, as far as I can tell. So, this one was a complete...
Forum: Troubleshooting Computer Displays 05-05-2010, 07:10 AM
Replies: 17
Views: 12,441
Posted By Oklahoma Wolf
Re: Half success on AL1716

Interesting... I never tried doing that with #1. Maybe there's hope for it yet. I decided I had to know for sure, so I have a batch of ten 1.8V LM1117's on order now. They were cheap enough to make...
Forum: Troubleshooting Computer Displays 05-02-2010, 04:11 PM
Replies: 11
Views: 6,967
Posted By Oklahoma Wolf
Hp Vs17

Ok, I've about had enough of this one. The patient, an HP VS17 (PK657AA), was given to me by a friend and is determined to send me to the crazy house.

Initial symptoms were the thing would turn on...
Forum: Troubleshooting Computer Displays 05-02-2010, 11:00 AM
Replies: 17
Views: 12,441
Posted By Oklahoma Wolf
Re: Half success on AL1716

Hello all - thought I would necropost this back up to the top. I have two of these AL1716B's on the bench right now, and I thought my own observations might be useful for future searches.

Both of...
Forum: Troubleshooting Power Supplies and Power Supply Design 04-19-2010, 12:12 PM
Replies: 11
Views: 3,797
Posted By Oklahoma Wolf
Re: Nexus 4090 Whining

FSP, actually.
Forum: Troubleshooting Power Supplies and Power Supply Design 02-25-2010, 08:10 AM
Replies: 75
Views: 33,778
Posted By Oklahoma Wolf
Re: Post your bad experiences with Antec power supplies here!

There won't be any Fuhjyyus in a Trio - that's a Seasonic built unit.
Forum: Troubleshooting Power Supplies and Power Supply Design 01-21-2010, 09:01 AM
Replies: 71
Views: 45,715
Posted By Oklahoma Wolf
Re: Antec 480W "NEO" PSU with Fuhjyyu caps

Send CWT an email and tell them you have a CWT-480EX revision B... they might help you with that. Worth a shot anyway.
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 01-03-2010, 11:22 AM
Replies: 29
Views: 7,919
Posted By Oklahoma Wolf
Re: Another Tagan, this time with failed Panasonic...

Sparkle is Fortron... FSP bought them up years ago.



FSP - the transformer markings are a dead giveaway.
Showing results 1 to 25 of 337

 
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