From: legg@nospam.magma.ca   
      
   On 28 Dec 2024 21:41:21 -0700, peter@easthope.ca wrote:   
      
   >Hi,   
   >   
   >I have a Macintosh clone PowerWave 604|132.  The user's manual is   
   >available from the Internet Archive and other servers.   
   >   
   >The power button on the front panel and the button on the keyboard   
   >both cause the fan in the power supply to spin and the LED in the   
   >front to illuminate. The display remains black.   
   >   
   >I've tried two monitors and a second PCI video card.  The display   
   >remains black in all cases.   
   >   
   >Neither the programmer's interrupt button nor reset button has   
   >effect.  Meaning the Apple ROM  isn't working?  The CPU isn't working?   
   >   
   >Should an audible tone come from the speaker when the machine   
   >starts?   
   >   
   >One memory card is in each of two banks of sockets.  Removing either   
   >card yields no change.   
   >   
   >The clock battery is probably dead but shouldn't cause this   
   >behaviour; correct?   
   >   
   >Adjacent to the memory are ROM and cache SSIMMs in sockets.   
   >Reseating is worth trying but the cards are stuck hard in the sockets.   
   >   
   >Other ideas?  Poke around with an oscilloscope?   
   >   
   >Thanks,                  ... P.   
      
   You might visually inspect the motherboard to see if there are any   
   signs of gross component damage.   
      
   pinholes in graphic processor chip bodies   
   bulging electrolytic capacitors   
   normal supply voltages/ripple (inspect power supply internally)   
   loose connectors.   
      
   remove, clean and reseat anything in a socket.   
      
   try booting from a removable disc.   
      
   RL   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)