Re: List of Bad Cap Manufacturers
My malfunctioning dvb-t decoder is full of them. Guess what I just had to change?...
JingYing
Member
Last Activity: 12-05-2015, 03:17 PM
Joined: 05-18-2013
Location: Turin
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Re: M2a-vm hdmi
By the way, the recap didn't work. I have exactly the same symptoms as before.
I tried to measure voltage around northbridge's mosfet (brownish area here: [url]https://www.badcaps.net/forum/showthread.php?t=29152[/url] ) and they seems coherent (0.6V, 1.9V and 4.2V with respect to ground; error 0.2V - cheap analog multimeter).
Maybe I'll try with one of those PCI card to see when it stops posting, but I'm about to give up.Re: M2a-vm hdmi<br /> <br /> By th... before.<br />Last edited by JingYing; 01-07-2014, 08:53 AM.Leave a comment:
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Re: M2a-vm hdmi
They should fit, you have exactly 6mm for each.
I didn't find ESR values for the original ones (105 mA for ripple current); maybe they are rated for generic purpose and you can find 5mm without looking for polymeric caps.Leave a comment:
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Re: how do you underclock an intel CPU?
For linux undervolting: [url]http://www.linux-phc.org/[/url]
I'm using the AMD version (kernel 3.2.46 and 2.6.32 against K10) but I guess the Intel one is pretty much the same.Re: how do you underclock an intel C...much the same.Re: how do you underclock an intel CPU?
For linux undervolting: [url]http://www.linux-phc.org/[/url]
I'mLeave a comment:
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Re: M2a-vm hdmi
Recapped!
The worst part was pinning the solder out (low quality stainless pins) and watching carefully for every little piece of solder that tried to escape. I think I got them all.
Desoldering wasn't so bad. Although this board shoud be lead free, I got through with my SPI41 (40W) with max 4 seconds on a couple of caps, just following advices (adding solder first).
Now it's really late here; tomorrow with sunlight I'll throughly check for solder drops and joints (somewhere I put too much solder)....Leave a comment:
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Re: Heatsink foam: keep, remove or replace?
As thermal paste I happen to have Zerotherm ZT-100 (maybe it's not like AS5, but surely better than the old-original-hard-to-scrap-away thing of the northbridge).
Probably a perfect-newbie question, but the mosfets dissipate mostly through the PCB, right? (Tab soldered to a wide copper area, etc...) Would it be efficient a heatsink "glued" on the upper side of the case?Leave a comment:
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Re: Heatsink foam: keep, remove or replace?
I guess it's my first board hacking that makes me paranoid on things I'm not sure about. That's why I asked, thank you for your contribution.
As for the material, I have something from an old broken PSU (sorry, no photo: it has been totally disassembled for learning purpose
). I'll probably add a 80mm-5V-powered fan over the NB heatsink [u]and[/u] the mosfets (this is an HTPC, silence is required). I'll have to build some sort of support first, keeping in mind the little space I have between...
Last edited by JingYing; 06-06-2013, 02:22 AM.Leave a comment:
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Re: Heatsink foam: keep, remove or replace?
Yeah, probably a better design (orienting cpu with stock heatsink fins toward the northbridge) and quality caps would have prolonged its life. Instead, now I have to "cure"... (still training on my old dead pentium II).Leave a comment:
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Re: Heatsink foam: keep, remove or replace?
Make them three! (Two near the IGP)
That's why I'm recapping those ATWY, and the KGZ, too!
[url]https://www.badcaps.net/forum/showthread.php?t=28796[/url]Re: Heatsink foam: keep, remove or r...?t=28796[/url]Leave a comment:
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Re: Heatsink foam: keep, remove or replace?
Thank you all, for now I'll try to keep it, remounting the heatsink very carefully.
I'll also add a fan over the northbridge heatsink and the voltage regulators.
Regulator heatsink is also a good idea, although I have no idea how to mount one on those (a simple vertical plate somehow soldered to the tab would be effective?) and I just hate the idea of having some output voltage towering around...Leave a comment:
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Heatsink foam: keep, remove or replace?
I'm [URL="https://www.badcaps.net/forum/showthread.php?t=28796"]recapping a M2A-VM HDMI motherboard[/URL]. The chipset heatsink (passive) is known to become very hot and watching how "brownish" got the motherboard (pic. 1 & 2), I decided to (at least) renew the thermal paste, maybe add also a fan, should the mb turn on...
Unmounting the heatsink I discovered a square of foam around the central area, where the chipset stands (pic. 3 & 4); it seems to be placed over the SMDs (pic. 5).
I really have no idea how to replace the foam, so I'm carefully scratching...Last edited by JingYing; 06-01-2013, 02:47 PM. -
Re: M2a-vm hdmi
I forgot: using different lead spacing is bad practice? (I can't find right ones)Leave a comment:
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Re: M2a-vm hdmi
Thank you for your reply,
between PCI I agree, but this evening I'll double check space around other caps: there are lot of smd I wouldn't touch/press (maybe raising caps a little).
Do I have to take particular care when soldering polymer, with respect to the general hints I found here about soldering?Leave a comment:
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Re: M2a-vm hdmi
Board mapped.
[B]color (qty): capac/voltage rad x height [brand series] ripple/impedence/life[/B]
purple (6): 1500uF/6.3V 8x21 [Panasonic FJ] 1870/0.016/3000
yellow (4): 1000uF/16V 8x19 [Chemi-con KZG NB/NC/NE] 1970/0.021/2000
green (15): 820uF/6.3V 8x12 [TK ATWY 738A/739A] 2550/0.036/2000
cyan (1): 470uF/16V 8x13 [Chemi-con KZG NL] 1970/0.021/2000
orange (7): 100uF/16V 5x11 [Panasonic MH] 105/?/1000
pink (4): 100uF/16V 6x7 [Chemi-con KMA] 97/?/1000
beige (1): 330uF/6.3V 6x11 [Sanyo WX N.E.75] 405/0.130/?...Leave a comment:
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M2a-vm hdmi
Here's my recap job in progress.
After 4 years of 24x7 good service, now it's not POSTing anymore.
Symptoms:
- green led signals "under power", fans start, 12V wire is 12V (at the PSU)
- with everything removed but the CPU, the board beeps "I miss the memory"
- with memory plugged (two memories, used both, used one at time, used in every one of the 4 slots) it doesn't post, doesn't reach the point to beep "it's all ok, now I'm booting"
Every connector has been unplugged, cleaned, replugged with no success.
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Re: New Members - please post your introductions here
Hello, I'm Ivan, from Italy.
I've always tried to build or fix things by myself. In these days this is becoming harder and harder as electronic gets more miniaturized, but I'll never surrender.
I joined this forum because I'm going to recap a motherboard in the next few days and, should I solve its issues, this seems the proper place to leave some notes to others.
See you around in the forum.Leave a comment:
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