On 21/08/16 07:58PM, Alexander 'lynxis' Couzens wrote: > Hi Spenser, > > > Issue is with flashrom though. Perhaps something about this chip in > > particular? Any ideas moving forward? > > you should check the power supply and try to improve the signals of your > SPI bus. > > power supply => either your power supply at all isn't sufficient or the > spi chip draws too quick power that an additional capacitor (of > the correct size) closer to the chip is required. > > signal => improve your cables, shielding, reduce EMI or > desolder the chip and put it on a seperate board, etc.. Or reduce the > spi speed, what you already did. Maybe use a different spi clip or > solder cables on top of your spi chip instead of using a clip. > > in-system flashs are always special and depend on the PCB of your > target board. Some boards aren't possible to flash at all. But you > should be ok (there is a low chance of bricking). > > For sure there are bugs in flashrom. But usually it's power or signal > integrity. If it's an bug within flashrom, I would also desolder the > chip and solder it to a small debug board. So you could reduce other > failures soures and test flashrom in a "known" environment.
Thanks for this, I got another SOIC clip since mine had degraded and bent leads. I am going to put in a T500 board in the R500 to make a frankenpad solution, since T500 boards have always worked fine for me and only cost $25. I've made a couple dozen of these laptops and am very happy with the process and demand. > > Best, > lynxis > -- > Alexander Couzens > > mail: [email protected] > jabber: [email protected] > gpg: 390D CF78 8BF9 AA50 4F8F F1E2 C29E 9DA6 A0DF 8604 -- CAEE B377 FC82 BAF9 102C D22F C5CE D003 1AA8 E281 Spenser Truex https://equwal.com
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