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#41
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Presario 2100 broken power connector
Here's an update from HP Power Connector Hell ...
When last we spoke, children, Uncle Phil had a piece of the old connector stuck in the motherf%&#&^board. Well, in desperatation and with not a little good luck, the heated soldering iron judiciously rammed into the offending piece eventually made it yield and come free. I installed the new connector purchased on eBay, did some really ugly soldering (my first attempt in this life), and everything worked. And, lo, there was joy in the land!.. ... For 10 days. After 10 days of working just fine, the new connector went on the fritz. Or at least the HP recognized the power cord being plugged in less and less. Finally, it didn't recognize it at all. And then finally the battery drained -- and all was dark in the land, and has been for several days (and with another mess of work stranded on the laptop -- I fought furiously against the dying battery to burn a CD with this new content, but I lost the battle, the CD wouldn't burn). Now an expert at dismantling a 2100 -- I can almost do it in my sleep -- I've taken the beast apart two or three times scouting for clues to the latest dilemma. The new connector is rock solid (held with solder and Gorilla glue). Don't know what the problem is. Any ideas? One other thing. When I took the machine apart, an mb component fell off -- a half inch square by quarter inch gray block below the right arm of the cooling fan "brace." There are two of these "blocks" present, with this on them: 1206-OR5 / TMP 336T. Any idea what they are and how they affect my sorry equation? I Gorilla-glued on the one that fell off and it held fine. Also: will it affect start-up if the antenna connectors on the underside of the mother are not connected. Didn't seem to, but they were too fiddly, so I left them. BTW Thanks for everyone's help and advice. And I look forward appreciately to the next batch in the hope you can help bail me out of the present mess. |
#42
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Presario 2100 broken power connector
pab1953,
Things "falling off the MB" doesn't sound good. Can you post/link some pictures? I don't have the 2100 I was repairing anymore (it was my sister's) to compare with. SG257 |
#43
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Presario 2100 broken power connector
pab1953 wrote: ... ...the HP recognized the power cord being plugged in less and less. Finally, it didn't recognize it at all. ... When I took the machine apart, an mb component fell off -- a half inch square by quarter inch gray block below the right arm of the cooling fan "brace." There are two of these "blocks" present, with this on them: 1206-OR5 / TMP 336T. ... An irritant that can also cause loss of power is failure at the DC cord/plug connection. This occurs when flexing of the cord's wire strands causes them to fracture inside the insulation, which typically occurs right where the cord enters the plug that you insert into your (new!) board receptacle. It usually goes thru an initial intermittent period, but will work temporarily if you grasp the cord just behind the plug and push it toward the plug body and see if power is restored. If so, the cure is to snip off the old plug, get a new one, and solder it to a "fresh" wire portion an inch or two farther back. While it's a smaller repair job than you've already accomplished, it requires more genteel soldering technique compared to the board jack, and getting the polarity correct (which wire is where) is also essential. An inexpensive voltmeter would help with this, in addition to seeing if there's any power present at the existing plug or not. As for the loose board component, that's particularly disturbing; they normally don't just fall off! I don't have a 2100, but the presence of numbers on the stray part suggests that it's not just a spacer or something, and probably needs to be soldered in place. (If so, the Gorilla-glue will present a problem.) Speculation: parts with that shape and size are often small transformer or inductors used in power supply switching and regulating. Googling reveals that the letters "TMP" might be "Taipei Multipower Electronics", which makes such devices. Does the other (?) one apparently still in place show a solder fillet at each end like the other surface-mounted devices on the board? With luck, the loose one somehow got karate'd off the board, and might possibly be soldered back in place, unless the part's -- or most important, the board's -- solder pads were damaged. You might surf around in the "products" section of- http://www.tmpco.com.tw Do any of those coils or transformers look like the part? These are usually in series with essential power circuitry, so a missing one would indeed bring things to a halt. (This may mean your DC power cord mentioned earlier is not the problem, but that's little solace by comparison.) Replacing the loose part with the same or a replacement part is a possibility if the motherboard itself is undamaged, but things are now officially becoming difficult. As for the wireless antenna, it hurts nothing if not connected. I'd connect it the last time you assemble the laptop, just to have the capability available, though. (And yes, I do know the joke is how to KNOW when the last time IS!) |
#44
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Presario 2100 broken power connector
is this it? the ones located with one having the blue sticker on it
http://img272.imageshack.us/img272/7699/picture213qn.th.jpg if so then they indeed to need to be soldered in place and would cause said problem. And if you are unsure about your soldering skill i would suggest you not attempt this till you are, find a friend or someone whom you trust to do the work. |
#45
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Presario 2100 broken power connector
I don't think it's that one. My digital camera's out being fixed or
I'd send a photo. Whatever the piece was, I glued it into place and it seemed to hold fine. But of course maybe it's connected to the problems I'm having. Yet everything works okay on the laptop when it's being powered from the battery. But now the battery's drained. |
#46
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Presario 2100 broken power connector
On reflection, I guess this photo is accurate -- but the piece that
fell off isn't visible -- it's "north" of the blue sticker item, under the cooling component. |
#47
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Presario 2100 broken power connector
sanmor8wrote:
I HAVE A PRESARIO 2100US AND IN ORDER TO GET POWER TO IT I HAVE TO BEND CORD AND IN AC JACK SEEMS A LITTLE LOOSE DO I NEED TO REPLACE AC JACK AND IF SO IS I CONNECTED TO THE MOTHERBOARD OR IS IT A SEPERATE PART WHAT CAN I DO? Ugh, you described my problem perfectly....i bought 3 new adaptors like an idiot thinking that was the problem, then i got so irritated i thoguht about selling it on ebay lol...i do not believe i am that technically saavy to fix it myself. Is anybody still out there to help out, maybe fix it for a price? |
#48
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Presario 2100 broken power connector
More than likely, the connector is hard soldered directly on the
motherboard, which will likely need to be pulled from the notebook. Possdibly it can be made secure with a re-solder. HH "spazbam" wrote in message ... sanmor8wrote: I HAVE A PRESARIO 2100US AND IN ORDER TO GET POWER TO IT I HAVE TO BEND CORD AND IN AC JACK SEEMS A LITTLE LOOSE DO I NEED TO REPLACE AC JACK AND IF SO IS I CONNECTED TO THE MOTHERBOARD OR IS IT A SEPERATE PART WHAT CAN I DO? Ugh, you described my problem perfectly....i bought 3 new adaptors like an idiot thinking that was the problem, then i got so irritated i thoguht about selling it on ebay lol...i do not believe i am that technically saavy to fix it myself. Is anybody still out there to help out, maybe fix it for a price? |
#49
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Presario 2100 broken power connector
I have had a similar problem with my Presario 2400. I disassembled the
entire unit (and believe me it is a terribly intricate job). What I found was that the power plug is on a small board (less than 1" square) which plugs into the motherboard. I unsoldered the external plug from this small board, and after playing around with it, I found that the little plastic tip on the male side of the plug was preventing contact from being made with the on-board, female side of the plug. I trimmed some of the plastic away from the tip (sort of made it conical in shape) and it has been working reasonably well since then. What was the amazing is that I was able to resolder the plug to the board and completely reassemble the whole laptop and it worked!! I say the plug has been working "reasonably well". That is to say, if you aren't careful when you move the machine around, the cord side (male) part of the connector sort of works itself out of the side of the unit very easily. This is sure a weak link in this whole setup, but I don't have a good solution. I suppose you might be able to find a new on-board connector, but I tried and had a lot of trouble identifying the correct part. Good luck Max Lynn "HH" wrote in message ... More than likely, the connector is hard soldered directly on the motherboard, which will likely need to be pulled from the notebook. Possdibly it can be made secure with a re-solder. HH "spazbam" wrote in message ... sanmor8wrote: I HAVE A PRESARIO 2100US AND IN ORDER TO GET POWER TO IT I HAVE TO BEND CORD AND IN AC JACK SEEMS A LITTLE LOOSE DO I NEED TO REPLACE AC JACK AND IF SO IS I CONNECTED TO THE MOTHERBOARD OR IS IT A SEPERATE PART WHAT CAN I DO? Ugh, you described my problem perfectly....i bought 3 new adaptors like an idiot thinking that was the problem, then i got so irritated i thoguht about selling it on ebay lol...i do not believe i am that technically saavy to fix it myself. Is anybody still out there to help out, maybe fix it for a price? |
#50
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Presario 2100 broken power connector
I am assuming this is something you would not suggest a lay person
doing without much computer background? HHwrote: More than likely, the connector is hard soldered directly on the motherboard, which will likely need to be pulled from the notebook. Possdibly it can be made secure with a re-solder. HH "spazbam" wrote in message ... sanmor8wrote: I HAVE A PRESARIO 2100US AND IN ORDER TO GET POWER TO IT I HAVE TO BEND CORD AND IN AC JACK SEEMS A LITTLE LOOSE DO I NEED TO REPLACE AC JACK AND IF SO IS I CONNECTED TO THE MOTHERBOARD OR IS IT A SEPERATE PART WHAT CAN I DO? Ugh, you described my problem perfectly....i bought 3 new adaptors like an idiot thinking that was the problem, then i got so irritated i thoguht about selling it on ebay lol...i do not believe i am that technically saavy to fix it myself. Is anybody still out there to help out, maybe fix it for a price? [/quote:e48267c63c] |
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