Melco Need Help With Boot Error (computer hardware prob? :: Industrial Electronic Repair

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Melco Need Help With Boot Error (computer hardware prob?
  Posted by JACK L FEAK on Friday, September 4 2020

We have a Melco EMT 10/4T machine with a start-up boot problem. I believe there may be a electronics hardware problem (memory error?). Error is “BOOT DISK ERROR_”. After replacing the floppy disk drive and new boot floppy disk a closer examination indicates a problem in the self test routine (I think). The system used to go through the self tests and then looks for the floppy but now stops after the RSA Memory Test PASSED, and immediately displays "B4" and stays there until enter is pushed again.

Do you have any idea where to start troubleshooting? I have an electronics degree so you can talk as technical as you wish. We were hoping to diagnose the problem and send you only the defective part for repair. (my guess is dynamic ram error bank 4 on CPU board but just a guess). See the following boot display sequences. Any Help would be greatly appreciated!


System stack PASSED
RSA Memory PASSED (then jumps immediately to "B4" and stays until “Enter” is pushed)

Bunch of corrupt characters now displayed (stays on that screen until “Enter” is pushed)

Lan Card Locate PASSED
LAN EEPROM LOAD PASSED
Self-test PASSED
EBIOS V1.04 928K
INSERT BOOT DISK_
BOOT DISK ERROR


machine info
Melco EMT 10/4T
Model 01050002
Serial # 790799
Mfg date 01/2000


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