- HP DV9000 no video. - 3 Updates
- CRT Television Hum - 2 Updates
- Aiwa cassette deck, displaced widget, no REW - 2 Updates
| "David Farber" <farberbear.unspam@aol.com>: Jul 16 03:30PM -0700 Ken wrote: > To tell you the truth, I would not put too much labor into this model > computer. Especially with it's history. You could be making a career > choice. Hi Ken, For $80 I can send the motherboard in to have the GPU reflowed and have a modified heat sink installed to keep it from overheating again. It comes with a 60 day warranty. The gentleman that fixes it says he's had a very high success rate and if he can't fix it, there's no charge and free return shipping. I'm curious enough to see if that will fix it for good. If this all works out, I'll let you know. Thanks for your reply. -- David Farber Los Osos, CA |
| Jeff Liebermann <jeffl@cruzio.com>: Jul 16 07:22PM -0700 On Thu, 16 Jul 2015 15:30:30 -0700, "David Farber" >high success rate and if he can't fix it, there's no charge and free return >shipping. I'm curious enough to see if that will fix it for good. If this >all works out, I'll let you know. I also send out the boards for repair. I have the same hot air SMT desolding station, but have had lousy luck with reflowing the video chips. Of the various HP and Dell laptops with the alleged Nvidia problem, I've only successfully (long term) repaired 2 out of 7 attempts. The big problem is that I can't easily operate the motherboard outside of the case to see if I've succeeded. If I wanted to continue doing these repairs, I would need to build a fixture. There are three types of repairs for this problem. The cheap and easy fix is to reflow the BGA video chip and hope that it hold. It usually will if you don't bend the motherboard when you reinstall it. That's probably why both yours and my reflow jobs were failing after a few days. The not so cheap solution is to remove the chip, clean up the pads, and reflow solder a new chip in it's place. That's much more work, more expensive, but far more reliable. There are also those that will remove the chip, clean off both the chip and the PCB, and reball the motherboard. I've only had one of those done, and it worked just fine, proving that there's probably nothing wrong with the Nvidia video chips. It's possible that the vendors that replace the chips are using recycled chips in this manner. Some people have made a business out of replacing the chips, so prices have fallen. <http://www.ebay.com/itm/230491379295> Ask your vendor if they replace and/or reball the video chip. If so, they're probably ok. If they only reflow the existing chip with a heat gun or oven, you may have problems. Incidentally, I had no luck when I tried to reflow the motherboard in a toast oven. I only did one and it was totally dead when I was done. Oops. However, these JetDirect cards worked 100%. However, LJ2300 controller cards had only one success out of three: <http://802.11junk.com/jeffl/pics/repair/BGA%20reflow/> -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
| "David Farber" <farberbear.unspam@aol.com>: Jul 17 08:55AM -0700 Jeff Liebermann wrote: > Oops. However, these JetDirect cards worked 100%. However, LJ2300 > controller cards had only one success out of three: > <http://802.11junk.com/jeffl/pics/repair/BGA%20reflow/> Hi Jeff, I just sent an e-mail to the eBay vendor you linked and directly quoted your question about whether or not they do just a reflow or replace and/or reball the chip. It turns out the guy that I was going to send my board to for an $80 repair needs the entire laptop so I nixed that idea. Thanks for your reply. -- David Farber Los Osos, CA |
| MJC <gravity@mjcoon.plus.com>: Jul 17 11:20AM +0100 In article <55a7a649$0$12482$862e30e2@ngroups.net>, lugnut808 @spam.yahoo.com says... > You make a good point, some CRT TVs are quite efficient. Also I like > the idea of having a particle accelerator in the living room. You've probably got one in the kitchen, too! |
| Chris Jones <lugnut808@spam.yahoo.com>: Jul 18 12:28AM +1000 On 17/07/2015 20:20, MJC wrote: >> You make a good point, some CRT TVs are quite efficient. Also I like >> the idea of having a particle accelerator in the living room. > You've probably got one in the kitchen, too! Yes, I guess it will be a while before a GaN FET will be cheaper than those bits of metal and magnets, and a good while longer before they are anywhere near as robust. |
| N_Cook <diverse@tcp.co.uk>: Jul 17 11:59AM +0100 Having maintained this deck over the years, new silicone rubber bands , tyres and pinchwheel etc. Annoying having to drop out just because a white plastic wishbone/quadrant arm linkage thing has dropped out and laying in the bottom of the casing. Buggered if I can see where it has dropped out from. I can manually turn the capstan with REW engaged and by pushing a lever over, by finger, the REW mechanism will engage but I cannot see where and how this linkage does the job of my finger. Full SM with exploded views seems to have a different mechanical deck to this AD F220. neither http://www.radiomuseum.org/r/aiwa_stereo_casette_deck_ad_f2.html or http://gooroo-blog.blogspot.co.uk/2010/06/1986-deck-aiwa-f220-magnetofon-kasetowy.html have a pic of the right area . Google images has failed, no type number on the deck or in the manual that I can find, unless 58-3-25 is the deck type, rubber stamped with red ink like the 1983 date in black ink. Any other ideas? |
| N_Cook <diverse@tcp.co.uk>: Jul 17 12:30PM +0100 That widget is nothing to do with REW it is one of the levers active from the "top" ledge of a cassette, the one for the REC inhibit slot, dislodged. So something wrong with the power-take off cam system presumably, not so straightforward as replacing a linkage. |
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