Author Topic: SD2SNES RAM test failure  (Read 1130 times)

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Offline drk421

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SD2SNES RAM test failure
« on: April 15, 2021, 03:47 AM »
Getting a black screen only with my SD2SNES. Other carts work perfectly including my older flash carts (first version of Super Everdrive).

It's out of warrant, maybe it can be fixed?
Several other reports on the forum, so I guess this a  common problem?

Some people have re-flowed the solder on the RAM chip and that may fix it.
Any other help appreciated. It would be a long ways back to the Ukraine from here.

[EDIT]
I should also mention that I tried 3 different SNESes and 2 different power supplies so I don't think there's a problem with the original hardware.

I ran the diagnostics and here are the results:

Code: [Select]
===log opened===
derp
SD test... please insert card
=============================
data=111133b04504
crc1 = d805a1bf crc2 = d805a1bf   PASSED


RTC Test
========
setting clock to 2011-01-01 00:00:00
2011-01-01 00:00:00
waiting 5 seconds
new time: 2011-01-01 00:00:05
PASSED


FPGA test
=========
configuring fpga...
fpga_pgm: 212501 bytes programmed
FPGA configured
basic communication test...PASSED


RAM test
========
Testing RAM0 (128Mbit) - clearing RAM - writing RAM - verifying RAM -error @0x000000: expected 0x00, got 0xfc
error @0x000001: expected 0x01, got 0xf9
error @0x000002: expected 0x02, got 0xfc
error @0x000003: expected 0x03, got 0xf9
error @0x000004: expected 0x04, got 0xfc
error @0x000005: expected 0x05, got 0xf9
error @0x000006: expected 0x06, got 0xfc
error @0x000007: expected 0x07, got 0xf9
error @0x000008: expected 0x08, got 0xfc
error @0x000009: expected 0x09, got 0xf9
error @0x00000a: expected 0x0a, got 0x68
error @0x00000b: expected 0x0b, got 0xd9
error @0x00000c: expected 0x0c, got 0x68
error @0x00000d: expected 0x0d, got 0xd9
error @0x00000e: expected 0x0e, got 0x68
error @0x00000f: expected 0x0f, got 0xd9
error @0x000010: expected 0x10, got 0x28
error @0x000011: expected 0x11, got 0xd8
error @0x000012: expected 0x12, got 0x68
error @0x000013: expected 0x13, got 0xd8
error @0x000014: expected 0x14, got 0x28
too many errors, aborting
RAM0 FAILED
Testing RAM1 (4Mbit) - writing RAM - verifying RAM...RAM1 PASSED


SD DMA test
===========
clearing RAM - loading test file - verifying -error @0x000000: expected 0x00, got 0xfc
error @0x000001: expected 0x01, got 0xf9
error @0x000002: expected 0x02, got 0xfc
error @0x000003: expected 0x03, got 0xf9
error @0x000004: expected 0x04, got 0xfc
error @0x000005: expected 0x05, got 0xf9
error @0x000006: expected 0x06, got 0xfc
error @0x000007: expected 0x07, got 0xf9
error @0x000008: expected 0x08, got 0xfc
error @0x000009: expected 0x09, got 0xf9
error @0x00000a: expected 0x0a, got 0xe8
error @0x00000b: expected 0x0b, got 0xd9
error @0x00000c: expected 0x0c, got 0x68
error @0x00000d: expected 0x0d, got 0xd9
error @0x00000e: expected 0x0e, got 0x68
error @0x00000f: expected 0x0f, got 0xd9
error @0x000010: expected 0x10, got 0x68
error @0x000011: expected 0x11, got 0xd8
error @0x000012: expected 0x12, got 0x68
error @0x000013: expected 0x13, got 0xd9
error @0x000014: expected 0x14, got 0x6a
too many errors, aborting
FAILED


Loading SNES test ROM
=====================



sysclk test
===========
measuring SNES clock...
21477348 Hz
21477349 Hz diff = 1  max = 1
21477348 Hz diff = 1  max = 1
21477348 Hz diff = 0  max = 1
   CPUCLK: 3474584
  READCLK: 0
 WRITECLK: 0
  PARDCLK: 0
  PAWRCLK: 0
  REFRCLK: 78730
ROMSELCLK: 0
PASSED


SNES test status: IRQ: 00   PA: 00   MEM: 00/00
Timeout! SNES appears to be dead!



TEST SUMMARY
============

flash check:   1111-4-33b04504-dfb09a7f-ba-11-0 
Test      Result
----------------
SD        Passed
USB       not implemented
RTC       Passed
CIC       no run
FPGA      Passed
RAM       FAILED
SD DMA    FAILED
CLK       Passed
DAC       not implemented
SNES IRQ  FAILED
SNES RAM  FAILED
SNES PA   FAILED
« Last Edit: April 15, 2021, 03:49 AM by drk421 »

Offline Richardragon87

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Re: SD2SNES RAM test failure
« Reply #1 on: April 15, 2021, 04:10 AM »
Did you try testing it on the SNES Technical Service Rom where it checks all of your drives to see if they are functioning correctly, this is a way to ensure it's not anything to do with RAM being failed in the device as it will not progress the test screen if it doesn't say OK on all of them.
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Offline drk421

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Re: SD2SNES RAM test failure
« Reply #2 on: April 15, 2021, 08:23 PM »
Not sure what you mean "Technical Service Rom". Is this something that tests the SNES itself? I've run the official Nintendo diagnostics from another flash cart and they test out fine.

My SD2SNES just gives me a black screen and does not boot up. The SD2SNES diagnostics will run, and I've posted the log from the diagnostics.


Offline Richardragon87

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Re: SD2SNES RAM test failure
« Reply #3 on: April 15, 2021, 10:16 PM »
Not sure what you mean "Technical Service Rom". Is this something that tests the SNES itself? I've run the official Nintendo diagnostics from another flash cart and they test out fine.

My SD2SNES just gives me a black screen and does not boot up. The SD2SNES diagnostics will run, and I've posted the log from the diagnostics.

It was a test service rom that was used in the 90's to ensure the device was still working correctly, is a bit scary like a debug mode but it's safe to use on your device it is best to use it once a year or earlier to make sure everything is working fine, here's a video of what it does - https://www.youtube.com/watch?v=Edg3J8O0jcc
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Online TheShadowRunner

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Re: SD2SNES RAM test failure
« Reply #4 on: April 16, 2021, 04:29 AM »
Ok, so of course passing the nintendo check with test rom is absolutely irrelevant to the subject of this thread.

The failing RAM0 test occurs on the SD2SNES itself. Either the chip died or some contacts around it got bad (happened to me on RAM1 actually).

At the time Ikari told me a few points around the chip I should check for good contacts and resoldering a certain leg did the trick.

Op come to Discord to ask Ikari directly, he'll tell you where you should check based on your SD2SNES revision.
« Last Edit: April 16, 2021, 04:44 AM by TheShadowRunner »

Offline Richardragon87

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Re: SD2SNES RAM test failure
« Reply #5 on: April 17, 2021, 01:41 AM »
Ok, so of course passing the nintendo check with test rom is absolutely irrelevant to the subject of this thread.

The failing RAM0 test occurs on the SD2SNES itself. Either the chip died or some contacts around it got bad (happened to me on RAM1 actually).

At the time Ikari told me a few points around the chip I should check for good contacts and resoldering a certain leg did the trick.

Op come to Discord to ask Ikari directly, he'll tell you where you should check based on your SD2SNES revision.

How's' it irrelevant? It's an official checksum program that makes sure everything works in the real hardware, the Gameboy ones are also recommended to be used as well with any other device that had the official ones. (This doesn't include the fanmade checker ones that used a sprite from Snatcher on them in the front image) just the official Nintendo Service centre ones as they are a must have with any everdrive infact they are likely the most useful roms you can ever use as it not only checks your device to make sure stuff is always functioning at proper capacity but will also check the sound channels, button inputs and more... keeping in mind for a handheld this will only check your Gameboy series device and not be useful for the Everdrives.
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In any case, my other photos can be viewed here, I will be glad to meet you, I love flirt))

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Online TheShadowRunner

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Re: SD2SNES RAM test failure
« Reply #6 on: April 17, 2021, 05:28 AM »
How's' it irrelevant?
Flaw is on SD2SNES, not SNES.

Offline nuu

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Re: SD2SNES RAM test failure
« Reply #7 on: April 17, 2021, 11:16 AM »
He can't run the Aging Cassette ROM if the SD2SNES doesn't even boot up the normal firmware.