Re: Need recapping help for Asus A78NX
way too much solder, you may be shorting two traces with the solder or have a bad solder connection.
way too much solder, you may be shorting two traces with the solder or have a bad solder connection.
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Re: Need recapping help for Asus A78NX
How many watts is your solder iron rated for, and how clean is the tip? I think the second photo indicates the iron isn't delivering enough heat to melt the solder to the copper traces of the motherboard. I normally use 40W.Comment
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Re: Need recapping help for Asus A78NX
need flux. badlyCap Datasheet Depot: http://www.paullinebarger.net/DS/
^If you have datasheets not listed PM meComment
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Re: Need recapping help for Asus A78NX
I bought a cheap 60 watt iron. It came with a fine point tip which does not seem to hold a lot of heat. I really had to work at getting the solder to melt at times and it would go allover. Should I completely remove solder and start over?
I believe I have read not to remelt solder.Comment
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Re: Need recapping help for Asus A78NX
You are using way too much solder, try removing some solder from the joints and use some flux to get better joints, although those joints look shiny they might not adhere to the pads on the mobo. Also, any beeps from the mobo?Guns don't solve problems. I'll take 12
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Re: Need recapping help for Asus A78NX
And a blonde moment may be the cause. O_O (cracked the core when installing heatsink) (I did that to my T-Bird 1.3 in October, 2002) I got impatient when clamping the socket 462 heatsink.
(Ironically, after just coming back from getting new heatsink paste at RadioShack!)
That will cause the nothing-other-than-fans-and-leds syndrome.ASRock B550 PG Velocita
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Re: Need recapping help for Asus A78NX
I do have a kit for this board....
https://www.badcaps.net/store/produc...&products_id=8
This all I've ever needed to replace on one of these boards, the tiny ones never fail. As for the non POST issue now, recheck all your solder joints....you probably fubar'd a through hole (this assuming the CPU and RAM are good)....but I have seen bad caps on these boards fry processors, so definitely try another CPU before you pronounce it dead.<--- Badcaps.net Founder
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Re: Need recapping help for Asus A78NX
I think your problem is that the iron has too much power and makes the tip to get too hot, causing oxidation form an insulating layer that prevents good heat flow. This oxidation can be so bad that solder won't immediately melt even when i's pressed directly against the tip. Once a tip oxidizes, it has to be cleaned off (brass wool, steel wool) and retinned to work again. Also high temperatures can prevent the solder from sticking, I think by burning up the flux before it can clean the surfaces.Comment
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Re: Need recapping help for Asus A78NX
random: can someone fix the thread title? It's A7N8X, not A78NX (doesn't exist)
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Re: Need recapping help for Asus A78NX
No beep codes..... I probably rushed my way through this so I will remove and retry. I will clean the iron as suggested and work on my soldering skills (or lack of) and report back. Luckily, I bought extra caps just in case.
I don't think that I cracked the core or anything like that. Other than the sloppy soldering, I really took my time removing the caps and cleaning the holes.
I am confused as to what the flux is for. I don't have any and will have to order if it is necessary.
Would the computer POST or begin to POST if some of these caps were properly placed ? Do all 8 of the caps that I replaced need to be perfectly
installed or will one bad one prevent POST ? Just curious.
Also, I did order the other caps that were suggested but have not considered replacing them yet as I wanted to first replace the obvious bulging ones. I didn't want 30 bad solder joints to have to figure out.
Thanks everyone for the help. I am already shopping for my new build but I am not going to give up on this yet !!Comment
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Re: Need recapping help for Asus A7N8X
Here's an excellent tutorial on how to solder. Flux is used to remove oxidation from pads and joints so solder can form well and adhere to pads and leads.
http://www.youtube.com/watch?v=I_NU2ruzyc4Guns don't solve problems. I'll take 12Comment
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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... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
Hi,
I recently bought an ASUS ROG STRIX B550-F GAMING motherboard that was listed as "dead, not powering on." However, it does show some signs of life. I've performed several basic measurements and would like to share the results.- The board enters a "ready to power on" state after plugging in the PSU.
- Pressing the power button increases power draw.
- Sometimes, touching the RSMRST_L pad with a multimeter probe causes the board to shut off and return to standby.
(taken after pressing the power button, while the board is attempting to start)- H_SKTOOC#
06-11-2025, 01:05 PM -
Hi everyone,
I am trying to learn electronics repair. I purchased a “faulty for spares/repairs” ASUS X99-PRO/ USB 3.1 motherboard for a very low price from ebay – a good enough price to offset the high probability that the board was completely toast and not realistically repairable.
Initial results:
Board would power-cycle when turned on either with switch on board or shorting pwr pins. Fan would spin for a second or so and a QCODE of 00 would display then it would power off and then do the same thing again over and over. I think maybe 2 times in about 100 attempts... -
Hello everybody,
This is my first post here, I've always loved to tinker with electronics, but never got in-depth with it. Hope I can learn a thing or two from this forum.
I've got a 31.5" Asus monitor which distorts/flickers at equal intervals of a couple of seconds. From what I've gathered, it's an issue with the T-CON board, but feel free to correct me. Shipping from the manufacturer would cost 3x as much as the part itself. I was wondering, if there is a way to diagnose the board itself and replace the faulty components? I'm good with soldering, but not at all...11-22-2024, 04:07 AM
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