Replace a1286 logic board
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- #REPLACE A1286 LOGIC BOARD INSTALL#
- #REPLACE A1286 LOGIC BOARD ARCHIVE#
- #REPLACE A1286 LOGIC BOARD SERIES#
Problem: Very low sound output for digital sound. Solution: Bad LS139 at 5F on the video board. Pins 13 and 14 had input on thatĬhip, but there was no output on pin 10. The clock comes from pin 10 of the LS139 at 5F. When I got to the LS237 at 6J, it was dead. Solution: 74LS02 at 1C on the CLK board at 1CĪll sprites were missing, the I finally traced from that data linesīack to see where a chip had died.
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I noticed that if I shorted pins 2 and 3 on the LS02, the picture would semi-straighten Looking at the schematics, there is a 74LS02 connected to the VBLK/CMPBLK outputs. Problem: TKG3 board set - Board will not sync Solution: Replaced bad MC10125 at 1H on the Video board. The ladderĪt the beginning would move up and when Kong pounded on the girders they wouldīreak, but Kong, Mario, the barrels and everything else that moved was missing There were NO moving sprites on this board at all. Solution: replace bad EPROM at 3F on the CPU board. Make a long story short, I finally changed the sound EPROM at 3F and thatįixed the problem, Kong is now grinning away and you can hear him again. I don't know what else to call this sound, but after KongĬlimbs the girders and stomps on them to break them all, he grins and you Solution: replace bad electrolytic capacitor and reflow the solder joints I replaced the cap and reflowed the solder on the other electrolyticĬapacitors and re-installed the board. Looking closerĪt the board I bent back the electrolytic capacitor at C387 and the leg came off Swapped the board with another one and the hum disappeared. The Sanyo monitor has a small audio amplifier board on it, I Problem: loud hum sound at all volume levels Solution: reflow the solder on the caps in the sound circuit. Then reheated the solder on all theĬaps and transistors around the area of C22 and the ones around two
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cap, as it was corroded leg was falling off, Jumps on and breaks the girders in the introduction and no sound whenįirst, I cleaned and re-seated all the eproms and the 8039, no change.
#REPLACE A1286 LOGIC BOARD ARCHIVE#
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#REPLACE A1286 LOGIC BOARD INSTALL#
However, if you are in possession of a Dual Core Mac Pro device, you will find more stability in the X 10.4.11* version to install any program.Ĭontent provided for informational purposes only. If your device is powerful enough to handle the most complex and maximum version of the Mac OS, you should probably install the X 10.13.x* for Dual Cores, Core i5s and Core i7s. Which OS can seamlessly power these logic boards? The 512 pre-installed storage spaces in the logic boards can also be configured up to 4 TB. You can configure the pre-installed 256 GB of storage space into 512 GB, 2 TB up to 4 TB. MacBook Pro computers feature either 256 or 512 GB of storage via hard disk space. The minimum and maximum RAM caps range from 32 GB to 128 GB. However, even though most of the logic boards feature extra slots for expanding their RAM capacity, they cannot exceed the RAM maximum cap that limits your Mac Pro device. It is understandable that you may desire to expand the RAM capacity of your Apple laptop.
#REPLACE A1286 LOGIC BOARD SERIES#
The MacBook Pro computer series features differently specialized computer models that feature different RAM configurations and capacities. Twelve Core 2.66: processing speed of 2.66 for every Core.Quad Core 2.0: processing speed of 2.0 GHz for every Core.Quad Core 2.66: processing speed of 2.66 GHz for every Core.Quad Core 3.0: processing speed of 3.0 GHz for every Core.When turbo-boosted, most of the Cores in every model can soar to a processing speed of 3.8 GHz. The following are some of the options you have if you purchase conveniently at eBay when you want to get a replacement logic board that suits your computer’s processing power. Intel builds the processor microchips, and they are powered by Core Xeons’ cutting-edge technology. However, you must make sure to get only the logic boards that are compatible with your MacBook. You should always seek replacement logic boards that hold the potential of upgrading your current laptop. The MacBook Pro series of Apple computers is diverse enough to feature different processing powers across the product line. What is this logic board’s Central Processing Power rating? eBay’s user-friendly website will make finding and purchasing your right Macbook Pro logic board simple. Commonly Asked Questions Regarding MacBook Pro Logic BoardsĮBay offers a variety of MacBook Pro computer logic boards in various conditions for users seeking to replace their logic board or keep extra logic boards handy.