I have been posting in the power supply forum about an Antec NEO 480 that died and took my MSI KT4V along with it. Basically, There was a normal power failure and when I went to turn the computer back on it would not power up. I think the fuhjyyu caps in the NEO crapped out and then applying power to the motherboard after the power failure took out my KT4V. The computer was plugged into a UPS. All the components from this system aside from the power supply and motherboard work fine and I am using them now in my rebuilt machine. I would however like to learn by trying to fix my old motherboard and power supply. First off the Antec NEO still powers up a lightly loaded system (MB w onboard video and memory only) so I think that it can be salvaged. The KT4V I am more worried about. Using a different power supply I can get the motherboard to power up, but not post. No video signal no nothing. The fans will spin however. It is interesting that the fans power up as soon as I hit the power supply power switch. I do not have to jump the power pins. Is this a lost cause? Could it be Mosfets? I have recapped a motherboard and a video card so I think I would be capable of the repairs. I also have just purchased a soldering station. It is a Weller WES51 and I am excited to use it. My previous repairs were done with a radio shack cheapo. I am on a quest to learn this stuff and I would appreciate any feedback that you guys could give me. If I repair this stuff it will probably be used as back up stuff, but it is nonetheless important to me. There are some pics in the power supply forum so feel free to respond in this thread or the Antec NEO thread in the power supply section. Thank You.
-
-
Re: Kt4v
Did you try clearing the BIOS?Presonus Audiobox USB, Schiit Magni 3, Sony MDR-V700 -
Re: Kt4v
Yes and I also tried swapping the bios chip from a working motherboard of the same model.Comment
-
Re: Kt4v
Does anyone think this board is worth trying to repair. Is it too difficult to diagnose a problem like this?Comment
-
Re: Kt4v
I feel like a leper
. Maybe If I mention sex someone will help me with my KT4V. SEX SEX SEX SEX. 
Comment
-
Re: Kt4v
ROFLOL!Originally posted by NitwigI feel like a leper. Maybe If I mention sex someone will help me with my KT4V. SEX SEX SEX SEX.
since i have not seen you board come in for repair i dont have firsthand experience with that model.
what test equipment do you have?Comment
-
Re: Kt4v
Thank you for responding KC8. You were actually the person I had in mind. I have been reading these forums a lot and it seems that you have a great deal of experience in motherboard component repair. I think I could learn a lot from you and many of the others who post here regularly. I do not have very much test equipment. I have an Antec power supply tester and a Cen-Tech 7 function multi-tester that I got from Ebay for very cheap. The multi-tester claims that it can : Get accurate readings for dc voltage, dc current, ac voltage, resistance, transistor test, diode test & battery test. I have a small computer repair business that I work on the side and most of my repair work is the simple swap out motherboard/hard drive/power supply type of stuff. I also assemble custom high end gaming rigs and that sort of thing. I have recently become interested in component repair but my only experience with that is swapping out bad caps on a couple items (successfully) I am willing to purchase more equipment if you think it would be helpful. I would ultimately like to expand my repertoire into repairing laptops at the component level as I am finding that I have to turn down jobs involving laptops since they usually involve a bad motherboard. I figure that if I can repair this motherboard it would be a good start.Comment
-
Re: Kt4v
In general once a motherboard has been tested out of the case using a known good power supply and having the bios reset many times and you still get the fans spinning using a known good cpu and memory is the board toast? Should I just desolder the new Rubycons I put on there and toss the board in the trash?Comment
-
Re: Kt4v
When all else fails... yeah recycle those ruby's
Viva LA Retro!Comment
-
Re: Kt4v
May be the failing 5v Sb from the Antec has fried the chipset on the board.
This is not uncommon todays as many PSu`s have crappy caps on the 5v sb section.
Probably there is no easy repair for this.
Any way, you can chek the CPU voltage, if this is in spec, i would not bother to repair it.Comment
-
Re: Kt4v
So did I do myself a disservice by replacing the power supply that was in there before with the NEO? I upgraded the power supply on that machine when I purchased a 6800GT video card. I was using an Antec truepower 430 before that. I then put in a 7800GS card. The power supply only lasted about two years. How would I go about testing the cpu voltage? I do have a multimeter. Should I be testing the cpu voltage on the motherboard or the power supply?Comment
-
Re: Kt4v
Case Closed. I couldn't take it any more. I removed all the good caps from this motherboard and then stomped on it and threw it in the trash. I feel better now.Comment
-
Re: Kt4v
Hmmmm... why stop there? nothing beats the personal satisfaction of torching a badly behaved motherboard! LMAO
Attached FilesViva LA Retro!Comment
-
-
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles... -
Hello!
i got a damaged Manson NTP-5561 (60V, 1,6A DC output) and and the main issue is that the controler IC for the LCD display has a short. The controler IC PIC18F87K90 is mounted on the back of the back of the LCD. Vss-Vdd = 3 Ohm. The 5V and 3,3V power line was killed as well, but that is not a problem. A new LDO 3,3V and 5V 7805 is already ordered.
Replacing the PIC18F87K90 is necessary but that makes no sense without having the HEX dump of the new controler.
Does anybody have such a power supply and could do a HEX dump of the Flash and EEPROM memory?
...04-12-2025, 10:38 AM
Comment