Re: Cable Modem Repair - Why Do They Fail?
Thnaks to everyone else who replied. I appreciate your input. It didn't really help, but was appreciated anyhow.
It appears this thing is not repairable, based on what the circuit board looks like - with the extensive amount of SMD devices on it. So I guess I'm giving up and am gonna go get ripped off at Fry's Electronics and pay too much for another worthless P.O.C. that's going to burn out in a few years. :-(
stevekasian
Old N00b
Last Activity: 07-15-2019, 01:20 AM
Joined: 12-19-2010
Location: Claremont, CA
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Re: Cable Modem Repair - Why Do They Fail?
Thanks for your reply. I understand why they are built to fail; I'm just curious what the parts are that tend to go bad in them most often... because, in my experience, they tend to fail the same way each time: Intermittent connectivity. So I am assuming it is the same parts that go bad most of the time....Leave a comment:
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Re: Cable Modem Repair - Why Do They Fail?
Cox rents them, and they cost $120/year. Could buy one for that, but would rather repair this one if possible.
Looking at the PCB layout though, I'm doubtful it's possible or practical, as it appears to be populated by 90% SMDs.
Please see attached images:...Last edited by stevekasian; 07-09-2019, 08:53 PM.Leave a comment:
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Re: Cable Modem Repair - Why Do They Fail?
Cisco DPQ3212. It's a Cable data/telephone modem, from Cox Communications. It has started intermittently going offline and resetting. I can't find any rhyme or reason to it. It's always run very hot, but temp doesn't seem to be a factor in it's intermittency... although I don't doubt that high temps have likely contributed in no small way to it's overall degradation.
It belongs to Cox, but it's so old (DOC SIS 3) that they will let me keep it if I want it, since it's gone bad anyways. To get the latest HSI cable modem standards,...Leave a comment:
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Cable Modem Repair - Why Do They Fail?
Hi,
I want to repair my cable modem instead of paying far too much for a new one, that will only fail after 4 or 5 years anyways. So I have some questions:
Since cable modems (and also routers, for that matter) tend to fail at almost predictable intervals, I'm interested to know if anyone can tell me what electronic components inside the units tend to fail. Does anyone know?
(Please note: I am not looking to troubleshoot my internet connection - I am interested in repairing cable modems only.)
Thanks!
SK -
Re: Unknown Motherboard Recapping
...not to mention any SMDs that may get hit with the tip! (I had to heat the legs on the front side of the board a few times to get them to punch through the holes. Tricky with a really hot and large iron.)
Thanks. I've done a bunch of TVs & monitors (thanks to help received on this forum!), just never a computer mobo until now. And they are quite a bit different than your standard single layer circuit board.Last edited by stevekasian; 09-08-2018, 09:04 PM.Leave a comment:
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Re: Unknown Motherboard Recapping
She works like a charm! The boot order got changed in the BIOS somehow, but other than that I managed to keep everything intact, including drive order and letters. :-)
Thanks again for everyone's help and input here. It was really swell of you all to help out!Leave a comment:
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Re: Unknown Motherboard Recapping
Finally tackled this and got'er dun today. Finished product picts included; With a disclaimer on the board work: I am obviously not a technician, and these required a LOT of heat (I bought an 80w iron with a huge chisel tip, as recommended), and the board got a little browned in the process. I think it's all or mostly just melted/burned resin though.
Anyways, gonna put the computer back together and see if she works.
Thanks again for all the help folks!
SK...Last edited by stevekasian; 09-05-2018, 09:45 PM.Leave a comment:
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Re: Unknown Motherboard Recapping
Thank you!Leave a comment:
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Re: Unknown Motherboard Recapping
Appreciate the advice, thanks.
As for the caps, I just want to make absolute sure before I replace them (I just received them in the mail today): The originals are 6.3v, and you recommended I replace them with 2.5v rated caps. This is not an oversight, right? Don't want them to blow! Thanks.
SKLast edited by stevekasian; 08-27-2018, 06:31 PM.Leave a comment:
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Re: Unknown Motherboard Recapping
And, of course, you were correct (as y'all pretty much always are!) on the CPU - The board has a 6 core CPU on it, not an 8. My bad...
SK...Leave a comment:
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Re: Unknown Motherboard Recapping
My bad; I glanced at the search results page I linked to (with a bad link, mind you) and misread what I saw.
[B]They are, indeed, 8mm OD with 3.5mm spacing.[/B]
(And DOH! The board says "ACER, Inc." right on it.)
Awesome! Thanks so much for your help, folks.
Now I'm wondering if I bit off more than I can chew with this soldering job. The board has no traces on the back of it connecting to the capacitor leads. And it doesn't look like any are visible on the front. So do I...Last edited by stevekasian; 08-23-2018, 05:02 PM.Leave a comment:
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Re: Unknown Motherboard Recapping
Some additional info: As it turns out, the "darkening" of the board around the CPU was actually due to dust collection there. So there is no visible heat-related discoloration there, which is a good thing.
Additionally, the CPU & board ran cool when it was properly ventilated (I worked on the machine soon after it was built - in early 2011 or so), so cooling is not an issue so long as everything is operating as it should (i.e. no dust bunnies in there, fans working properly, etc).
So I'll need...Last edited by stevekasian; 08-22-2018, 04:39 PM.Leave a comment:
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Re: Unknown Motherboard Recapping
Thanks for the input; However, this is likely not an OEM Acer board, as it was purchased retail from Tiger Direct or some such website.
The PC overheated due to dust collection in the CPU heat sink fins. It did, in fact, regularly shut down on him, but he did not understand why. He didn't get a hold of me and tell me about the issue until it had been shutting down for some time, thus the caps were exposed to extensive heating for a while....Leave a comment:
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Re: Unknown Motherboard Recapping
Thanks, everyone. Much appreciated help and info.!
Now that I think about it, it does have an 8 core AMD CPU, but not sure which one. I also know that the computer it was in was built as a custom box, so the motherboard and other parts were purchased individually.
Of course, my best option is to replace the mobo, and would be made even more awesome if I could find an exact replacement, as the setup is rather complex and will take forever to get the OS back into proper working shape with a different mobo model.
...Leave a comment:
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Re: Unknown Motherboard Recapping
Thanks. It says: M/B MBGAY0900103300072EK01, but I don't find anything for that part #.
Please find picts attached. (Please disregard the first one - it's blurry.)
No information on the board is available, and I haven't removed the CPU to find out what kind it is.
Other than the 6.3v 1800uf rating, the caps just have an "FL" after the 105°C, and also an "M" inside of a box, which I've recreated in photoshop in a rough manner and attached below with the picts. There is nothing else...Last edited by stevekasian; 08-21-2018, 02:31 AM.Leave a comment:
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Unknown Motherboard Recapping
Hi,
I have a friend who gave me his old motherboard to recap.
I am only replacing the visibly bad caps around the CPU, as he allowed the heat sink to become clogged with dust and it overheated the CPU. This went on for some time, damaging the caps nearest the CPU due to the heat. You can see they are clearly leaking and bulging. All other caps look fine (althought I realize they might not necessarily be), and are located much farther away from the CPU than the "gang of 8" I am replacing;-).
My main concern, at this point, is finding suitable... -
Re: Just Need A Little Refresher
Thank you!!Leave a comment:
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Just Need A Little Refresher
Hey folks,
I have been away from the repair game for a while and just need a little refresher, as I'm a bit rusty.
In the case of an LCD TV/monitor that powers up, has backlight, has sound, but has no picture (black), what are the most common problems?
Thanks,
Steve -
Re: Polaroid 42" TLX-04244B
I'm back! And now I've got to figure out what to do with this TV...
Does anybody else here reading this have any experience with LCD screens having tab-bond issues, and maybe a more definitive affirmation as to whether or not the pictures I posted above are typical symptoms of a tab-bonding issue?
Just hoping to get a little more to go on before deciding whether or not to tear this thing down in the pursuit of possible wild geese!
Thanks,
SteveLast edited by stevekasian; 10-07-2012, 07:00 PM.Leave a comment:
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