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Main rig:
Gigabyte B75M-D3H
Core i5-3470 3.60GHz
Gigabyte Geforce GTX650 1GB GDDR5
16GB DDR3-1600
Samsung SH-224AB DVD-RW
FSP Bluestorm II 500W (recapped)
120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
Delux MG760 case
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Re: The KING
Sounds like a great repair project! So did you fix it? That would be a real challenge for you. Post some pictures and tell us what all blew up.
I did notice that my Sun Pro had terrific "cost out" features. The driver transistors did not have any 4148 protection diodes. There were no 4148 protection diodes in the base circuits of the switching transistors. With Power_Good low indicating a problem, the output voltages were present instead of shut down. Now I wonder if that ceramic fuse is really just a solid jumper wire!
Two of my IMicro power supplies will handle all of my Pentium 3 and Pentium 4 boards. The other IMicro (the one that gave so much trouble) and the KING will handle the Pentium 3 board. So at least all are functional.Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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Re: The KING
Of the ten JEE small capacitors I replaced only three had bad readings:
47 uF/16 volts measured 12 uF esr=10
10 uF/50 volts measured 8 uF esr=5.3
2.2 uF/50 volts measured esr=3.4Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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Re: The KING
What about leakage?
Years ago, I built a single supply audio preamp. So the inputs and outputs were floating at half B+ (biased with resistor chains), isolated by coupling caps.
I used "recovered" caps of questionable origin and one channel didn't work. Turns out I lost bias because one of the caps was leaky- looked like a bad opamp. Even replaced the opamp to no avail.
Finally got disgusted and stole some Nichicons from something else I built. Worked fine after that..."pokemon go... to hell!"
EOL it...
Originally posted by shango066Originally posted by smashstuff30guilty,guilty,guilty,guilty!
guilty of being cheap-made!
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Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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"pokemon go... to hell!"
EOL it...
Originally posted by shango066Originally posted by smashstuff30guilty,guilty,guilty,guilty!
guilty of being cheap-made!Comment
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Re: The KING
I didn't. It was just not worth it,and 5vsb transistor along with a rectifier were both reduced to ashes. Literally paperthin heatsinks,crapcaps galore and and utter crap build quality.
I just gutted it and got a mid-to-high-end Deer that was already recapped with Rubycon MHZs (not fakes,I checked them twice),a few Teapos (I think they still work
) and Pannies. 5vsb Pannies. Also,rectifiers are all up to running a Pentium 4 (30A for 5v and 3.3v, 20A 60v rectifier for 12v 
)
This is the PC it powers now:
ASRock 775V88+
Pentium 4 3.00GHz LGA775 - EM64T support
Sony CDRW/DVD-ROM
40GB PATA HDD
320GB WDC SATA HDD - not connected atm,I have to wire up a SATA power cable since the normal 4pin Molex doesn't seem to work when used on this board.
ASUS Radeon HD3450 512MB
old PCI audio card I don't remember - filler card,unused
Realtek 8139C NIC
Winfast TV2000XP Deluxe - DScaler,since I'm going x64 this time
All these are powered by my Fortrex ST-400 (Deer) PSU. It's one of those PFC models by the way,and the PFC actually is real,not fake.
As for my old I-Micro,well,it's time had come and it was finally scrapped. I replaced it with a FSP FSP300-60GTP which I had to replace some bulged caps on. Removed the scorched 5v load resistor for safety reasons. (the heatshrink on it was literally ASHES!)Last edited by Dan81; 08-30-2015, 11:51 AM.Main rig:
Gigabyte B75M-D3H
Core i5-3470 3.60GHz
Gigabyte Geforce GTX650 1GB GDDR5
16GB DDR3-1600
Samsung SH-224AB DVD-RW
FSP Bluestorm II 500W (recapped)
120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
Delux MG760 case
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Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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Re: The KING
Yes,this was my last (and only) working I-Micro (rebranded "Delux"). I scrapped it when I upgraded to an Athlon 64 X2 5600+ system,which was really power hungry (along with the usual stuff like 4 pin ATX12v cable it also required a 4 pin HDD/CD/DVD Molex cable) so I replaced it with the FSP which can take much more than the I-Micro.Main rig:
Gigabyte B75M-D3H
Core i5-3470 3.60GHz
Gigabyte Geforce GTX650 1GB GDDR5
16GB DDR3-1600
Samsung SH-224AB DVD-RW
FSP Bluestorm II 500W (recapped)
120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
Delux MG760 case
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Re: The KING
Now I feel like the last person in the world to have a working IMicro! I thought it was better than the Sun Pro (KING) in the first post in this thread.Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)Comment
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Re: The KING
I don't know....This doesn't look like a Sun Pro to me. The layout looks like it, but nothing else. It doesn't use the typical Sun Pro font for the "fuse warning," KT markings on the transformer (with a different font), an actual TI 494 chip. Also, I don't trust the UL number or KY-xxx number. I've seen a "Rhino" branded unit with the Sun Pro UL number, KY-450ATX model number, but a Leadman was inside. Gross!Comment
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Re: The KING
Could be that Sun Pro and Leadman are (or used to be) the same company - at least that is my theory anyways. I think Leadman used to have some low-end units that were very much like the KY-450ATX. Also, Leadman/PowMax and Sun Pro are the only two manufacturers that I know that use different size diodes for the bridge rectifier on the primary side (usually two big and two small ones).
Or perhaps Sun Pro copied some of Leadman's designs or cost cutting procedures. Either way, both companies make very crappy PSUs. Maybe some of Sun Pro's "high end" units aren't that bad. But still, I wouldn't spend money buying one.Comment
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Hi, I'm Daniel, and I'm new to the world of repairing motherboards.
I would like to create a table, or more likely a guideline about the voltage rails and their possible resistance rail.
I know that the motherboard design has a very big depend on the rail's resistance, but I would like to know what is the smallest value for a rail that can be acceptable. For example, I heard that some new gaming motherboards can have 0,5 Ohm resistance on the GPU rail, but on an older type, it could be a sign of a shorted GPU rail.
So, I generated a table with AI so I can... -
I have pondered this idea for a while now and I would like for anyone who has any ideas for if this would work I have one that I might scariest it just to see if it could be done
I am thinking it might be possible to get a battery pack configuration that should work but I not exactly sure if it feasible or not
I was just looking at some HP elite 8300 computer that are used and the price has gone up since the last time I was looking at them on eBay really this sucks to find this out about a year ago you could find them with shipping for around $50.00 of course they have...07-07-2024, 03:01 PM -
Good day to all. The bite alarm drains 9-volt Krona batteries. Current consumption when switched on is about 50 mA. I wiped the board from oxides, I will attach a photo (on the board there is a j3y transistor and a 7533 stabilizer, the microcircuit is erased = (the 3.3-volt stabilizer heats up weakly. I replaced it, nothing changed. I unsoldered the microcircuit, the consumption disappeared. The resistance on the pins of the unsoldered microcircuit from the point clockwise is more than 2 megaohms, the 11th leg is presumably ground. I warmed up the microcircuit, the consumption does not change....
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Hello everyone,
I'm trying to repair my old Acer Nitro 5 (AN517-54-55T5). I've already bought a new laptop, so this is more of a learning project. For the experience, with no high expectations of success.
Well, my decice specs are the following:
Model: Acer Nitro 5 AN517-54-55T5
CPU: Intel Core i5-11400H
GPU: NVIDIA GeForce GTX 1650
Motherboard: GH51G LA-L181P Rev:1c
The symptom:
When pressing the power button, the power LED lights up for about 5 seconds and then turns off. Initially, the issue was intermittent: sometimes...05-26-2025, 10:49 AM -
Hi everyone,
Brought a non functionnal PS5. Apparently only a bad PSU...
No beep, nothing.
After some tests i found this :
- PSU is fine (12 volts stable)
- 12 volts line is shorted
- DA9065 was fried, F7003 also => Replaced both of them, short is gone on 12 volts line, no dead short anywhere else.
- By the way, nothing change. No signal, no power, no beep.
Mesuring all rails with my workbench psu (12 volts input)
- 0.00 amp drawing
- 12 volts, 5 volts, 2 volts, 1,15 volts are presents (suppose new DA9065 do is...
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