x68000:black_screen_on_xvi_hd_and_potentially_other_hd_computers
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x68000:black_screen_on_xvi_hd_and_potentially_other_hd_computers [2018/12/28 11:45] – created leonk | x68000:black_screen_on_xvi_hd_and_potentially_other_hd_computers [2018/12/28 12:23] – [Problem and solution] leonk | ||
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- | ====== Background | + | ===== Background ===== |
- | The X68000 | + | All X68000 computers suffer from the same 2 main problems: |
* Bad power supply (due to blown capacitors and other failures) | * Bad power supply (due to blown capacitors and other failures) | ||
* Dead SRAM save battery | * Dead SRAM save battery | ||
- | Assuming you did a full capacitor kit on the computer, replaced or fixed the power supply and installed a new save battery to store SRAM settings, | + | Assuming you did a full capacitor kit on the computer, replaced or fixed the power supply and installed a new save battery to store SRAM settings, a good working X68000 will typically show you the following screen: |
+ | {{: | ||
+ | |||
+ | But on an XVI HD and potentially other HD computers, you might get a black screen. | ||
+ | |||
+ | ===== Verify you have a good computer ===== | ||
+ | |||
+ | Boot up the computer while holding the CLR button. | ||
+ | |||
+ | ===== Problem and solution ===== | ||
+ | |||
+ | It seems the HD version of the X68000 computers requires a hard drive to boot. The SCSI hard drive chain beings at the bottom I/O board, it connects to the external I/O adapter and lastly ends at the internal drive. The end of a SCSI chain must always have terminating resistors. | ||
+ | |||
+ | If you don't have any SCSI devices connected, the system ROM hangs waiting for the SCSI device. | ||
+ | |||
+ | To solve this problem, simply connect a SCSI device to the external output (like the SCSI2SD solution) or an internal SCSI hard drive with a terminator. Or, you can add an external SCSI terminator to the SCSI port, or add the missing terminator resistors internally (the internal resistors might prevent you from using an external SCSI2SD solution) | ||
+ | |||
+ | You can also confirm you have this problem by looking at the external I/O adapter. | ||
+ | |||
+ | {{: | ||
+ | |||
+ | Here's how an externally terminated connector will look like, when it's terminated internal to the X68000. | ||
+ | |||
+ | {{: | ||
x68000/black_screen_on_xvi_hd_and_potentially_other_hd_computers.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1