Emu XL-7 & MP-7 User's Group

Hi,

Yes the voltages seem Ok, so here's something to try:

Try to boot the 2500 straight into diagnostic mode. Do this by holding down both the left + right cursor buttons while you power on.

This, I understand, bypasses the loading of the main operating system and loads a smaller, erm, diagnostic mode up. Once you get into diagnostic mode there are several things you can check, RAM, sound ROM, outputs etc. Use the wheel to select the function, then press enter to perform that function. Be careful, some functions will wipe your patterns/multisetups/etc.

It may be that the main OS, which I think is held in flash ROM, is corrupted. If that's the case, reloading the main OS might put things right. The OS load menu is entered in a similar way to the diagnostic mode so there's more chance of it loading successfully, you hold 'enter' while powering on.

Let us know if you can get into diagnostic mode.  

Thanks,
Matt

--- In xl7@yahoogroups.com, "John" <evening@...> wrote:
>
> Hello everyone, 
> 
> When I power on my 2500 it gets stuck with all LEDs lit and black boxes on the upper row of the LCD.
> 
> I suspected a power issue but 
> I've measured the PSU w/ my DMM and it reads as it should when powered on: (Pins 1-10 = 0, 9, 3.3, 3.3, 5, 5, G, G, -13, +12)
>  
> I've re-seated all of the cables, ROMS, and tried booting without ROMs
> 
> no changes
> 
> Any other suggestions?
> 
> I'm suspecting something on the main logic board, but without a service manual that could be hard to troubleshoot.
> 
> peace, jmw
>