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#11
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ASROCK Dual 939 smoking!
DKarma wrote:
I bought this board w/ all other new components to build a new system. I hooked everything up and a resistor or diode started smoking! The board refuses to post after said smoking occurred. This will be the third board of this brand in a row this has happened to...exactly the same every time. I plug them in put components in and they smoke...same place. I was using a stock power supply that came w/ the case that I bought new from this place so after the second burned board I got a new PS and RMA'd the board (the old PS didn't have a -5 rail for some reason so I thought that was the problem. I put it together again today w/ new PS (completely diff brand) and the damn thing smoked again...dunno if it is the board but it isn't the PS thats for sure. I have it plugged into a power strip that the old comp was plugged into also. Other components are as follows: Board 1 Asrock.... Stock xion PS and case (MS) MWAVE brand ram 2gigs 3500+ AMD 250 gig SATA hdd....?brand. Board2 same as board 1 Board3 Asrock...new after 2nd RMA Aspire PHATTY new PS and Xion case again same ram same processor same hdd What are the chances of 3 in a row? I'm either retarded or one unlucky *******. Have you done the voltage mod before installing the board? If you have and messed it up, it will fry the board for sure. I've built 2 systems using this board including the one I'm using right now. They are solid as a rock which makes me believe it's not the board but something else in your system. Bob |
#12
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ASROCK Dual 939 smoking!
"Conor" wrote in message t... In article .com, DKarma says... I bought this board w/ all other new components to build a new system. I hooked everything up and a resistor or diode started smoking! The board refuses to post after said smoking occurred. This will be the third board of this brand in a row this has happened to...exactly the same every time. I plug them in put components in and they smoke...same place. Err..what graphics card are you using? If you are using a 3.3V AGP card, it'll kill the motherboard. Yeah, that's the first thing I thought of, too. I killed a Syntax motherboard last year by plugging in an old TNT2 card. It was keyed correctly to indicate that it was AGP 4x compliant, but I didn't find out until later that some TNT cards adhered to that standard and others didn't. The number of slots in the edge connector wasn't a reliable method for determining the card's voltage requirements. sigh It also proves that one of the components you are using is possibly faulty, rather than the motherboard itself. -- Conor, Same ****, different day. |
#13
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ASROCK Dual 939 smoking!
DKarma wrote: I bought this board w/ all other new components to build a new system. I hooked everything up and a resistor or diode started smoking! The board refuses to post after said smoking occurred. This will be the third board of this brand in a row this has happened to...exactly the same every time. I plug them in put components in and they smoke...same place. I was using a stock power supply that came w/ the case that I bought new from this place so after the second burned board I got a new PS and RMA'd the board (the old PS didn't have a -5 rail for some reason so I thought that was the problem. I put it together again today w/ new PS (completely diff brand) and the damn thing smoked again...dunno if it is the board but it isn't the PS thats for sure. I have it plugged into a power strip that the old comp was plugged into also. Stock xion PS and case (MS) Asrock...new after 2nd RMA Aspire PHATTY new PS and Xion case again While it's possible you didn't take adequate precautions against static electricity or shorts between the motherboard and case, I believe your problem has been those junk power supplies you've been using. Aspire is low-end Topower, and Xion is Deer, which is always worse than the worst Topower. When a supply can't put out enough power, its voltage drops. The voltage regulator on the motherboard compensates by raising its voltage, but if the voltage from the supply is too low, the regulator can overcompensate enough to damage its components. This is why supplies are supposed to include protection not only against over voltage but also under voltage. Stop playing around with junk power supplies and get something substantial, such as a 450W or higher Fortron, PC Power & Cooling, Antec, or Seasonic. -5V doesn't matter, but high amp capacity on the +12V does. "Dual rail" +12V is not necessary The next time you try out your setup, first do it with the motherboard outside of the case, and don't install anything not absolutely essential to verify basic operation. You need only the motherboard, CPU, CPU cooler, 1 memory module, keyboard, video card, power supply, on/off switch (or use a jumper to briefly short the 2 power-on pins together on the motherboard), and reset switch. To test the CPU better, also install a floppy drive so you can run MemTest86 from it. Place the board over the sheet of anti-static foam included with it, and place all that on top of some books to give clearance for the rear bracket of the video card. You may want to buy a cheap digital meter to verify that all voltages are within 5% of ratings (3% is better). what could I put under the board? is there a spray or something? Nothing. The standoffs and any fiber (cardboard) washers provide all the insulation needed to prevent shorts, but you must install a support for each of the motherboard's holes, even where there's no matching hole in the case. You can use standoffs there (metal or plastic; they don't have to be attached to the case, only to the motherboard), or attach press-on bumper feet to the case under those holes. If you ever do need to insulate a board where clearance is tight, get fish paper from an electronics supply. It's thin cardboard but tougher and harder to pierce. Mylar sheet will also work, but I'd be hesitant about it since it can hold a much higher static charge. |
#15
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ASROCK Dual 939 smoking!
Jan Alter wrongfully top posted and wrote: wrote in message oups.com... The next time you try out your setup, first do it with the motherboard outside of the case, and don't install anything not absolutely essential to verify basic operation. You need only the motherboard, CPU, CPU cooler, 1 memory module, keyboard, video card, power supply, on/off switch (or use a jumper to briefly short the 2 power-on pins together on the motherboard), and reset switch. To test the CPU better, also install a floppy drive so you can run MemTest86 from it. I've had a floppy drive actually destroy a mb because it was shorting within it's own case. be considerate not to hook any peripherals up other than the graphics card which you have reasonable expectations of being OK, and if the floppy happens to be old try a new one instead. That's a rare defect, and it's far more common for a floppy drive to cause damage when when its power cable is plugged in wrong, with either the +5V or +12V line shorted to a ground pin. |
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