Re: "A Network Cable is Unplugged"
Set the speed to 10Mbps. This covers and solves an amazing number of cable, switch, NIC, and NWay compatibility problems.
Do your test installs to another hard drive so if the problem turns out to not be your bloated install of Windows you can just put it back.
severach
Badcaps Legend
Last Activity: 08-04-2016, 09:45 PM
Joined: 08-09-2007
Location: Michigan
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Re: ~13.8V MOT power supply
1 80A power supply is a lot harder to make than 8 10A power supplies. You'd only go to the trouble to make an 80A supply if you were going to spend it all in one place, maybe a 1000W amplifier.
Thanks to SMPS high current 12v power supplies are dirt cheap on eBay.Leave a comment:
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Firstly, I hope you dont mind this PM but i was reading your post with interest on the use of a bench psu to troubleshoot a motherboard and Leakseeker.
I have a Dell Studio 1558 which i cannot find a schematic for. When I plug the Dell DC cable into board the Blue LED on tip of cable goes out imediately. Removing / replacing PSU from / to mains LED returns? I therefore I assume I am looking for a short? and according to your goodself, the best tool for this is a bench PSU?
Where though do I start?
Thank you in anticipation for any advice
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Re: Post your system.......
MSI Z68A-G45 (G3), E3-1245 (4 core+HT), nVidia GTX 320, 4GB RAM, poverty case, Dell 265W 80Plus Gold power supply.
[SIZE="7"]Gateway [COLOR="Red"]XHD3000[/COLOR] [COLOR="Blue"]2560[/COLOR]x[COLOR="SeaGreen"]1600[/COLOR].[/SIZE]
Just a little overpowered! I'm wishing someone would take this E3-1245 off my hands so I can go back to the still overpowered Celeron G530.Re: Post your system.......
MSI Z68A-G45 (G3), E3-1245 (4 core+HT), nVidia GTX 320, 4GB RAM, poverty case, DellLeave a comment:
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Re: Stubborn solder won't leave hole!
A paper clip has the right shape but is the wrong metal. Solder will stick to it. A paper clip bends too easily. You also don't get to choose the diameter of the paper clip so it won't work when the board makers match the hole diameter to the lead diameter.
Using the butt end of a drill bit solves all these problems. Chuck the drill into a pin vice to keep the sharp end from drilling you.
A vacuum desoldering tool will destroy as many pads as a soldering iron. Hot air is the great equalizer. Heat the board up to 150*C...Leave a comment:
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Re: Matching VRM MOSFETS on a motherboard
Alpha & Omega AOD472 are common on Dell boards. I have so many I don't even collect them any more unless it's an easy solder board.Leave a comment:
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Re: MOSFET Tester
Atlas DCA - Semiconductor Analyser - Model DCA55
That gives you go/no-go. The next step up is a curve tracer. If that's not enough get a Semiconductor Parameter Analyzer. That what the pros use to generate all those nifty charts and parameter lists.Leave a comment:
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Re: Confusion about efficiency of different lamps
Voltage doesn't determine power consumption. Power is voltage times current. Rewiring a 110v motor to run on 220v does not substantially change power consumption. The voltage doubles and the current is cut in half leaving power the same. All raising the voltage does is reduce small current losses in the wire. Less is demanded of the copper. More is demanded of the insulation. Since the insulation tolerance is well above either voltage, rewiring the motor to 220v gains you a little bit of free power and reduces the current draw on...Leave a comment:
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Re: Broken am3+ socket -- info?
The sliding top of the socket isn't hard to replace. The trouble is getting an AM3+ socket top of the right brand. I'd try real hard to warranty it.Leave a comment:
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Re: Ratdude's Main rig V3.5
The pins on those connectors are too short to stick through. All you can get with an iron is solder mounds.Leave a comment:
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Re: Desoldering Braid: Tip - Trick
They are all acid based. The difference is what temperature are they active at. Plumbing flux is very strong but the drawback is that it is still active at room temperature so it will continue to eat through stuff if not cleaned off. Rosin flux is made to be much milder. It won't eat through the corrosion as rapaciously as plumbing flux will but Rosin flux is almost inert at room temperature and doesn't need to be cleaned.
Cleaning flux is a sign of good work quality so should be done whether or not it is of the "no clean"...Leave a comment:
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Re: Does anyone here use debug cards?
Port 80 POST cards work very well, particularly for the low price. At a minimum they tell you if your board has life when it won't show video. After a few screwups you start picking up on what some of the codes mean so you can instafix. C1, that memory must not be compatible. If it's counting the low numbers then I probably forgot to switch the KVM.
I have several but the only one I actively use is a card by QiGuan.Leave a comment:
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Re: Using 2v caps in the place of a 2.5v cap
Get the datasheet on the PWM voltage regulator chip. For example, the highest voltage offered on the ISL6247 is 1.6000v making a 2.0v capacitor safe no matter what processor is installed. If you're certain that no other processor will ever be installed then your 1.2v measurement is valid.Leave a comment:
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Re: HELP! - my girl is kicking the lead out of the house!
Live in the city? You're getting more lead in a glass of water than you can get from soldering. Tell her to take some Silymarin and quit drinking the water.
She sees the smoke and smells the odor. The smoke is the flux and the odor is the flux. The flux is not very dangerous. No lead jumps into the air.Leave a comment:
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Re: Laptop Motherboard Repair
Shorted chips usually heat up when current is supplied to the short. Heat sinks make the heat hard to find. Some good chips will overheat if they are powered by only some of their voltages.Leave a comment:
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Re: sharing internet with equal bandwidth
My Linksys Cisco RV042 has bandwidth control built in. Unfortunately I see a problem. 1Mbps is enough to watch 1 youtube video. 512Mbps is enough to watch none youtube video. Split it up and you both have nothing.Leave a comment:
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Re: Laptop Motherboard Repair
Wall warts are no good for short testing. 1A might be enough to burn the short out. Any more than 1A and the supply will shut down.
A bench supply won't shut down and allows you to control the current so you can get the shorted component to heat up without burning it up. Meters are good too so you know about how much heat you're looking for.Leave a comment:
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Re: Ratdude's main rig V3, maybe
Heat === failure. Little else matters. VIA has the lowest motherboard failure rate and it's wasn't because their tech was better. They ran the coolest. Seems VIA was more interested in low heat than nick'n a few more percents off the benchmarks. It shows.
Cool chips, long life. nVidia wouldn't have gone up in flames nearly so fast had their chips been engineered to run cool....Leave a comment:
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Re: Arc gaps on circuit boards?
But the cats all go to sleep at the same time so you need idle base load power at the ready. The cost of free cat power + idle base load power is no less than the cost of running the base load all the time and letting the cats sleep the remaining hour.Leave a comment:
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Re: Ratdude's main rig V3, maybe
Atom is the new Celeron. Same power & price as the good stuff but a lot slower. Have you built a D525 system that idles at 17W wall?
The 1155 P8B-M has IPMI and iSCSI boot capability which RD might want until he sees the price.Leave a comment:
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