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Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
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You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: Can a Bestec be made good?
Let me rephrase what i meant: a bulged cap is as bad as a leaking capComment
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Re: Can a Bestec be made good?
Third time's the charm!Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: Can a Bestec be made good?
Lol yeah im not real good at explIning stuff esp when i am usingan iphone and want ro make my message as short as possibleComment
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Re: Can a Bestec be made good?
You're right, they all have 5vsb - it is the ATX standard after all
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Stupid jokes aside, only the Bestec ATX-250 12E (and only that model) has the 2-transistor "mobo killer" 5vsb circuit. I think Everell and Severach did a pretty extensive research on that one.Comment
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Re: Can a Bestec be made good?
The Bestec ATX-250 12E is a GREAT power supply. I am still using one in one of my computers. The original 5vsb circuit has some design problems, but adding a small pc board with DM311 pwm chip takes care of that problem. Any glue that has turned brown or black must be removed (because it becomes conductive). And of course, the cheapo capacitors should be replaced. Best of all, you can install a fan on the back side of the power supply case, remove resistor R102, then install fan wires where R102 was. (If fan is too noisy just add a little series resistance in one of the fan leads) When computer is off but plugged into the wall outlet, the added fan will keep everything cool. When you power up the computer, the added fan shuts down and the original fan comes on and continues cooling the power supply. So don't say too many bad words about this really neat power supply!Attached FilesOld proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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Re: Can a Bestec be made good?
very impressive! i love it when someone takes a compromised design and turns it into something decent keep up the good work!My Computer: AMD Ryzen 9 3900X, Asrock X370 Killer SLI/AC, 32GB G.SKILL TRIDENT Z RGB DDR4 3200, 500GB WD Black NVME and 2TB Toshiba HD,Geforce RTX 3080 FOUNDERS Edition, In-Win 303 White, EVGA SuperNova 750 G3, Windows 10 ProComment
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Re: Can a Bestec be made good?
Nice job! Did you cut out where the fan is? I suggest you do becuase if the fan has the shove the air thorugjt the little vent slits in the psu casing there will be more noise and lower airflow
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Re: Can a Bestec be made good?
I used a nibbler tool to cut out a big hole before mounting the fan. Lots of air flow!Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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Re: Can a Bestec be made good?
Just chiming in here, I decided to disassemble my 2004 emachine, I don't have the specs with me right here ATM. But it has slowly become slower from what I think it should be. Loading google . com in chrome takes about 30-45 seconds.
I took it all apart and air canned the electronics and washed the plastic parts. It was extremely gross. It has a 300W PSU but again, I didnt think to get a pic. All I took a pic of was the MOBO. The Bestec 300W PSU looked fine. I did notice the CapXon 2 large caps and most of the rest were Jamicon and some black/yellow ones, which looked like a brand I have seen at Radio Shack, looked like it was a 'L' something.
This computer has been running for 10 years and of that time, I would leave it running in sleep mode or standby when I wasnt using it, I rarely shut it down. The glue has turned orange brownish. It is hard to tell how the caps are under the bundle of wires coming out of the corner.
Just wondering if the clumps of dust is making the computer slower?
Everything looking fine with the PSU does that mean it is good? It boots up fine and runs
side note, I saw some Sanyo caps on mobo, and they looked odd, it seemed like the caps were about to pop or the stress lines are deeper and more pronounced than say Rubycon. Sanyos were of a 'K' style also.Comment
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Re: Can a Bestec be made good?
start a new thread wih lots of foto'sComment
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PS4 1215A HDMI DIODE READINGS GOOD EVERYTHING GOOD BUT NO PIC? everything is good! what else can it be? if hdmi diode values are good that means encoder and filters are good right? idk what else it can be guys...01-05-2023, 12:32 AM -
I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly ‘new' Tcon board this time, and... -
Either I am getting old or dumb, probably both.
This “simple” linear power supply is driving me insane. Should be easy, right?
Here is the story. Got that Astron RS-7A or 10A as stone dead. I mean turned on and got 0.00V not even an mV on the output. Why dat? Darn electrolytic output capacitor shorted at the binding posts. No, problem… new one in stock and mounted.
Turned the PSU on again and now I got 0.1V on the binding posts. Everything clear like sunny day and replaced the LM723 regulator IC in the socket. Had it made, I thought.... -
Hi guys i like to buy tool that automatic unlock bios or find password also can flash and repair bios ic, looking for good tool have good software that have 1 click and unlock bios any recommend good tool? looking for sony ps5 and and laptop bios
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Hello guys,
I would like a quite old but still good 800 W ATX PSU to be repaired. The problem was an extremely heavy coil whine coming from the small secondary transfomer on the PCB.
I desoldered it hoping the references on the upper side would allow me to find a adequate replacement part. Sadly the written references drove me nowhere but to the manufacturer (I-MAG). I sent them a message like a bottle in the see asking them to send me a datasheet of the transformer. And... They responded ! I received a kind of datasheet (see attachment) but my competencies do not allow...
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