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8054 Rebooting a hardware problemHello,
I got mad and took my 8054 apart. It would reboot every 5 to 10 minutes with 164b34 software and at least every 3 hours with the 167 software. Well, I found a blown capacitor, a 680 mfd 6.3v, I changed it and for a lark retried my 8054, with the 164b34 software. I have been running for the last 24 hours with NO REBOOT, using the 164b34 software that would not hold for 10 minutes before.
Maybe we all have been trying to fight a hardware problem with software. Could be that USR just got a lot of bad caps.
Dave |
· actions · 2005-May-19 5:23 pm · (locked) |
| davepmer |
Update, now 48 hours and no rebooting |
· actions · 2005-May-20 10:12 am · (locked) |
| davepmer |
Anyone interested still not a single reboot. Believe capacitor to be C68. I replaced it with a 1000mmf 10v. |
· actions · 2005-May-22 9:45 am · (locked) |
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yeah ours was blown also, its the cap that looks diif from the rest, the metal top was bulged out, i replaced it with a 1000uf 6.3v (its a 680uf, 6.3v) |
· actions · 2005-May-23 1:30 pm · (locked) |
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to davepmer
Can you take a picture of the circuit board please?  Thanks:) |
· actions · 2005-May-24 1:25 am · (locked) |
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Paul G to davepmer
Anon
2005-May-24 4:18 am
to davepmer
Hello,
My USR8054 also keeps rebooting every few minutes and it is driving me bloody mad! I tried to open it and see whether it is caused by a blown capacitor as you have suggested, but I could not open the damn box. I am afraid I might break it.
I hope this doesn't sound too stupid, but how did you get to open it? |
· actions · 2005-May-24 4:18 am · (locked) |
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yeah its a pain & i really don't want to open mine again...
but anyway there's a clip under each leg -- you have to peel off the rubber pads for a total of 7 clips, there's no screws, so dont poke a hole thru the label--
i have no trick, just did it one by one with a small screwdriver... |
· actions · 2005-May-24 8:47 am · (locked) |
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Sorry I am not very good at taking a picture. But here it is. I tried to circle the capacitor to check. If you can not see my mark, the capacitor in question is the big one between the heat sink and the rf board. On my board the top was popped out on this capacitor. I did do some testing, the capacitor only has 1.7 volts across it, so it should not have blown since it was a 6.3 volt cap, so I think the cap must have been defective. |
· actions · 2005-May-24 1:16 pm · (locked) |
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IgorKane
Anon
2005-May-24 3:43 pm
There was a case of some faulty capacitors being produced in Taiwan and then sold to local manufacturers. As a result, a large number of reputable makers (ABit and ASUS included I believe) were making boards with caps that would blow and/or leak within a short period of time. This could be the same thing. ah, here » www.spectrum.ieee.org/WE ··· cap.html |
· actions · 2005-May-24 3:43 pm · (locked) |
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Could be, I looked at the bad cap I pulled out, the only brand name on it is STONE. By the way, the picture I posted, the circled cap is my replacement cap. |
· actions · 2005-May-24 5:06 pm · (locked) |
| davepmer |
Just for the record, I did email USR about the blown capacitor, they emailed me back, they are going to check to see if replacing that capacitor will fix other 8054s. I am guessing they are going to check returned units. |
· actions · 2005-May-24 11:33 pm · (locked) |
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to davepmer
does the replacement require any soldering?
or just pull it off, and push a new one in? |
· actions · 2005-May-25 2:45 am · (locked) |
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Sorry, you have to solder. Be best to be able to use solder wick or something to both remove the old cap and open the holes for the new one. There just is not a lot of room to do it any other way. |
· actions · 2005-May-25 8:39 am · (locked) |
Sathan
join:2004-08-15
Moncton, NB |
to davepmer
Just don't tell USR your did it. Cause they won't help you out at all if you call in and mention you opened up the router. |
· actions · 2005-May-27 3:41 pm · (locked) |
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I DID tell USR I did it. They replied, they are looking to see if this might fix other 8054s. |
· actions · 2005-May-27 3:50 pm · (locked) |
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to davepmer
This sounds awesome if it's true for mine. I'm gonna try to open it right now!
I've almost taken this thing out back and smashed it 4 times today alone. |
· actions · 2005-Jun-4 11:58 pm · (locked) |
| aCiD_ |
to davepmer
Bad Cap. |
You sir are my new hero. (See pic) 680uF, 6.3V, I'm gonna go out and get a new one tomorrow, if I can't find one around the house. And it even looks like a quick and easy solder job. Now thinking about it, this device worked flawlessly when I first got it, then just fell apart. |
· actions · 2005-Jun-5 1:21 am · (locked) |
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cool!, that how mine looked... are you gonna match the values or put a 1000uf (or bigger) in? |
· actions · 2005-Jun-5 1:35 pm · (locked) |
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aCiD_
Member
2005-Jun-5 1:48 pm
Defanitely match, you gotta match the capacitance, but you could increase the max voltage. But Dave said there's only 1.7V across it, so you shouldn't need to. |
· actions · 2005-Jun-5 1:48 pm · (locked) |
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i put a 1000uf/6.3v in & its been stable... if fact ever since i've not even had to think about it anymore-- just works! |
· actions · 2005-Jun-5 3:14 pm · (locked) |
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to davepmer
New Cap. |
Well I'm an impatient man, and you did 1000u, and there's no electronics stores open on Sunday. So I found a 1000uF 16V around the house, I've put that in and she's workn' RIGHT now. I'm happy. We'll see how long it stays stable! |
· actions · 2005-Jun-5 3:48 pm · (locked) |
| aCiD_ |
to davepmer
7 hours uptime, finally crashed...
Maybe I'll pursue the exact matching cap tomorrow. |
· actions · 2005-Jun-5 8:39 pm · (locked) |
| aCiD_ |
to davepmer
Well there's absolutely no electronics store near me that has any 680uF caps.
So I got even more creative and replaced the 1mF, with a 470uF, a 210u difference instead of 320u difference.
Using the 1mF I found the wireless was a lot slower than before the switch. Now with the 470uF the wireless seems much faster, and more responsive. Could just be fluke, or perception though.
Well we'll see if it stays stable with this one, otherwise I'll have to order a 680 online. |
· actions · 2005-Jun-6 7:56 pm · (locked) |
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sysoev to davepmer
Anon
2005-Jun-7 12:55 pm
to davepmer
Well, I've checked mine and found the same capacitor problem. I only managed to find 2200 mF 16V capacitor as the replacement. The behaviour of 8054 definetely improved - I do not have the series of self-resets, that can only be stopped by pulling the plug, but still, I have a couple of resets per day. Majority of them happen after bursts in traffic.
The question is - should I replace the capacitor to the exact 680 mF ? How your 8054 is doing after repairs ? Do you have any resets and how many ?
My FW is 1.21, cause 1.64 has a bug in PPTP client and seems less stable than 1.67 |
· actions · 2005-Jun-7 12:55 pm · (locked) |
una1337
join:2001-08-11
Boca Raton, FL
1 edit |
to davepmer
Nice. Been having a few daily reboots, so I thought Id open her up. Sure enough, one swolen capacitor. Found a gigantic Nichicon 16V 680uF in the box of parts in the garage. What I did not find however is desoldering braid, nor my solder sucker  Lets just say from now on Im either waiting till I find them, or going to radioshack and getting more first. Anyways, after about an hours worth of struggling to get the vias free of solder, then figuring a way to mount a 4mm spacing capacitor in a 2mm spacing hole (22ga wire wrapped around the positive terminal, soldered in place) I finished. Then, as I was re-assembling the whole thing, the bloody antenna shield solder joint broke off the daughter card. ****! Cursed for a bit, fixed it, and now Im happily off. So far, Iv transfered 2GB from wireless to wired without a reboot. We shall see how long this holds up. Edit: I have discected the old cap, and found it to be VERY dry. If you puncture and squeeze a new electrolytic, you get a sort of gooey mess out the side. This one, completely stripped from the can and placed into a vice, not even a wet spot on the vice. Sorry, no pics of this. I was off in mad scientist land. |
· actions · 2005-Jun-7 8:24 pm · (locked) |
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to davepmer
I'm still getting restarts and lockups with a 470uF. It's hard as HELL to find a 680u... You guys were lucky to have one around. Think I'll resort to ordering one online. |
· actions · 2005-Jun-9 4:05 pm · (locked) |
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to davepmer
My USR8054 is rebooting also... Seems as though USR should make good on these routers! |
· actions · 2005-Jun-14 9:33 am · (locked) |
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parsing
Anon
2005-Jun-23 8:38 am
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· actions · 2005-Jun-23 8:38 am · (locked) |
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to davepmer
Mine has now stabilized with the 470uF, hasn't crashed for a couple weeks, going strong. |
· actions · 2005-Jul-18 12:27 am · (locked) |
KUppianoKarl Uppiano
join:2003-02-02
Ferndale, WA |
to davepmer
I am considering purchasing a wireless router, and the 8054 is on my list. Everywhere I look, I see complaints about this unit resetting frequently, or running fine when new (weeks or months), and then the reset/lockup problems commence.
Power supply problems are notorious for firmware resets and lockups, and if USR got a bad batch of caps, that could easily explain this problem. However, I would be very interested to know if USR can tell us if this is indeed the problem, or if they intend to issue a recall of the affected devices. It would obviously be an addressable manufacturing defect.
I would be leery of purchasing this device until I had some assurance that the problem had been identified and corrected. I have no inclination to crack the case open and start soldering components, even though I used to make my living in electronics engineering. |
· actions · 2005-Jul-19 8:03 pm · (locked) |
Thanks:)
