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| mike <ham789@netzero.net>: Jan 30 11:16PM -0800 On 1/30/2018 6:55 AM, (PeteCresswell) wrote: > Has anybody rebuilt one? > Would I be naive thinking that all I need to do is > - Obtain replacement cells Assumes you can find QUALITY replacement cells. You want HIGH CURRENT cells like used in power tool batteries. High CAPACITY cells rarely have HIGH CURRENT capability. Anything you buy on EBAY with "fire" in the name probably won't be satisfactory. Purchased in low quantity, QUALITY cells probably cost as much as a new battery. If they're 18650 cells, Lowe's sells a Kobalt tool battery for $10. Contains six QUALITY HIGH CURRENT cells. > - Gracefully crack the case Can't tell from the picture whether those are screws holding it together. If it's glued... My favorite trick is to whack the seam with a sharp wood chisel and a hammer. Slow wont' do it. You need a high impulse whack with a low mass hammer wielded at high speed to crack the seal. It's very easy once you get the hang of it. > - Figure out how to connect the new > cells The circuit is trivial. Your problem is the spot welder you need to hook 'em up. DO NOT under any circumstances solder to the cells. If you start with tabbed cells, or remove tabbed cells from something like the Kobalt pack, you can often salvage enough of the old tab that you can solder the tabs quickly without hurting the cell. > - Replace the old cells with new cells Sometimes, this works. Other times, the battery protection circuit notices that you removed power and commits suicide. Without special equipment and the secret sauce, you can't recover the pack. Some have claimed that they hook up another set of cells to keep it alive while they remove and replace the cells. Never tried that. > - Close up the case I spent more than a decade trying to rebuild laptop batteries. I can point to exactly ONE success. And I have a spot welder. Vendors try very hard to prevent you rebuilding the pack. It's a big liability issue for them. It can be a big issue for you if you damage something and it sets your house on fire. Bottom line...go buy a new battery. |
| N_Cook <diverse@tcp.co.uk>: Jan 31 11:38AM On 30/01/2018 14:55, (PeteCresswell) wrote: > cells > - Replace the old cells with new cells > - Close up the case Check the charger as well. A nimh version I looked at recently, intermittent shorted wires on the the charger had drained the battery to internal dendriting or such. |
| bitrex <bitrex@de.lete.earthlink.net>: Jan 30 07:06PM -0500 The PC that had this Nvidia GTX 670 graphics card in it refuses to start any recent variant of Linux I try on it via a USB live installer, it shows the boot/BIOS and splash screens OK but ends up with a black screen or garbled graphics. Still not sure if it's a hardware or driver issue, but... This is the side of the GPU PCB facing upwards in the tower: <https://www.dropbox.com/s/1jq330axgnvlj7l/IMG_20180130_185355206.jpg?dl=0> Looks like thermal grease dripped all over it from somewhere. Related? |
| Terry Schwartz <tschw10117@aol.com>: Jan 30 04:37PM -0800 Have you verified that it's thermal grease? Looks almost like some form of corrosion. |
| Rheilly Phoull <rheilly@bigslong.com>: Jan 31 08:47AM +0800 On 31/01/2018 8:06 AM, bitrex wrote: > This is the side of the GPU PCB facing upwards in the tower: > <https://www.dropbox.com/s/1jq330axgnvlj7l/IMG_20180130_185355206.jpg?dl=0> > Looks like thermal grease dripped all over it from somewhere. Related? Did you clean it off ?? |
| dansabrservices@yahoo.com: Jan 30 05:20PM -0800 This card is toast. The white stuff is corrosion from most likely water or some other spilled liquid. Given the extent of the corrosion, I would doubt that this card is salvageable. The corrosion has likely eaten through the contacts under some of the ICs. You can try cleaning this off, but I doubt it will help. Dan |
| Tekkie® <Tekkie@comcast.net>: Jan 30 03:17PM -0500 Clare Snyder posted for all of us... > Better than 90% of vehicles with standard transmissions today have > NO MANUAL ADJUSTMENT PROVISIONS. > Mad MaX is an IDIOT. I wonder if this is the clutch he "replaced"? He doesn't know the olde heat and bend the rod trick... maybe use some all thread and burn an adjustment hole in the floorboard. -- Tekkie |
| Tekkie® <Tekkie@comcast.net>: Jan 30 03:21PM -0500 Clare Snyder posted for all of us... > point of "blowing smoke" he was restricted to using Bic stick pens > (pencils were no good because a pencil sharpener was beyond his level > of comprehension) Sharp as a marble aye? -- Tekkie |
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