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train123
Joined: 26 Jan 2010 Posts: 88 Location: Canada
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Posted: Mon Oct 03, 2011 4:32 pm Post subject: |
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Coming from a board manufacturing background I can tell you that in many cases, the use of BGA's (Ball Grid Array) IC's and FPGA's (Field Programmable Gate Arrays) makes it impractical to repair to board level.
Most tech's don't have the hot air soldering/desoldering equipment to properly replace BGA's and even if you get one installed, you need an x-ray machine to verify that all the balls soldered or did not short out. If you get that far, the new IC will be blank and it takes special equipment and the raw files to program the new IC. In some cases, the ability to program these boards are protected by the removal of JTAG or similar connecting portions of the PCB. |
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beezer Guest
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Posted: Sat Mar 24, 2012 12:16 am Post subject: discouraging |
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Seems like Vizio is a mistake. Mine did same thing, worked fine, slowly but surely failed to turn on (amber vizio light went completely dim), but being too busy to disconnect it (its our bed room TV) after about 2weeks the amber light grew brighter. On a whim I pressed power button on side of TV and after a couple of tries (flashed off/on repeatedly) the screen turned on! I knew I should have just left it powered on until it died, but I turned it off and I'm back to square 1. Time to buy another (brand) TV set. P.O.S.[/u] |
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