Hi,
I've just recovered an HP 9815A, it's in very good condition, the problem is that when you switch it on the display shows only a roe of minus and nothing else.
Does someone has an idea of what can I try to repair it?
Thanks Fabrizio
HP 9815A
|
03-31-2003, 09:04 AM
Hi,
04-01-2003, 07:00 PM
The row of dashes is generated in hardware (on the keyboard/display interface PCB) if the CPU board is not driving the display. So your problem could well be CPU/ROM/RAM related, it could be the power-on reset circuit, etc. |
« Next Oldest | Next Newest »
|
Possibly Related Threads… | |||||
Thread | Author | Replies | Views | Last Post | |
9815A/S option ROM | Joel Setton (France) | 0 | 796 |
03-08-2011, 12:43 PM Last Post: Joel Setton (France) |
|
9815A manual | Joel Setton (France) | 0 | 744 |
05-21-2010, 04:25 PM Last Post: Joel Setton (France) |
|
hp 9815a/s program tapes | frankabc | 3 | 1,359 |
10-28-2009, 09:46 AM Last Post: Joel Setton (France) |
|
hp 9815a/s repair | frankabc | 33 | 7,130 |
09-28-2009, 03:26 PM Last Post: Joel Setton (France) |
|
hp 9815a repair | frankabc | 6 | 1,872 |
10-16-2007, 12:27 AM Last Post: frankabc |
|
HP 9815A repair | frankabc | 7 | 2,022 |
08-25-2007, 02:26 AM Last Post: frankabc |
|
HEWLETT PACKARD 9815A Sale !!! | gileno | 2 | 1,127 |
02-22-2007, 05:43 PM Last Post: Steve Borowsky |
|
9815A up for auction | Les Wright | 3 | 1,316 |
01-15-2007, 02:49 PM Last Post: Steve Borowsky |
|
Synthetic Programming on the HP-9815A/S | John Ioannidis | 9 | 2,322 |
12-04-2005, 02:00 AM Last Post: John Ioannidis |
|
HP 9815A or 9815S? | Ken | 5 | 1,548 |
12-02-2004, 09:56 PM Last Post: Ken Delano |