The following warnings occurred:
Warning [2] Undefined array key 21818 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 21836 - Line: 275 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 275 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $thread - Line: 295 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 295 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Trying to access array offset on value of type null - Line: 295 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 295 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $fid - Line: 295 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 295 errorHandler->error_callback
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined array key 21836 - Line: 331 - File: inc/plugins/threaded_mode.php PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php 331 errorHandler->error_callback
/inc/plugins/threaded_mode.php 332 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 304 ThreadedMode::buildtree
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $theme - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Trying to access array offset on value of type null - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $theme - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Trying to access array offset on value of type null - Line: 3 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 3 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Undefined variable $lang - Line: 5 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 5 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks
Warning [2] Attempt to read property "messages_in_thread" on null - Line: 5 - File: inc/plugins/threaded_mode.php(305) : eval()'d code PHP 8.1.2-1ubuntu2.14 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/inc/plugins/threaded_mode.php(305) : eval()'d code 5 errorHandler->error_callback
/inc/plugins/threaded_mode.php 305 eval
/inc/plugins/threaded_mode.php 23 ThreadedMode::showthread_threaded
/inc/class_plugins.php 142 threaded_mode_showthread_threaded
/showthread.php 918 pluginSystem->run_hooks





HP-11C semi-dead or what ?



#3

first of all: I can't accept the fact that a HP-Calculator doesn't work
because of bad material, which fades away, or because of low accuracy
in the manufacturing.

It all began with a HP-11C ( USA 2552A03475 )I bought some weeks ago. It passes all
standard tests. All was very well. Then some day I want to have
fun with my little toy and played around. Hmm, what to do ? Another
key-board-test, but what's that, the display is frozen. Have I
pressed a wrong key or what ? panic....but remember old 41C...
get off the batteries...wait some seconds...and start again.
NOTHING....Hmmm....get off batteries put 11c on the shelf some
days....put in batteries...start....NOTHING...pressing randomly
some keys...oops, he is alive, works some seconds, but then gets
frozen again or doesn't start if turned off....same procedure many times. The machine doesn't
work reliable, but the core seems OK. I suppose it is in a special
state, some circuit/IC is in a wrong branch or something like that. Mechanical all seems OK.

I read some articles about dead 11C in this forum. Yes, I shortcut
the battery-contacts...WITH < shudder > and without batteries. Maybe now the
machine is really dead ;-)

Is there anyone out there, who can help me ?

Thank You.........Erich Neubacher


#4

Hi;

I had an HP12C in hands with a problem about the same; the difference is that it froze for good.

After resodering all of the IC's terminals, it became the same, good little girl "she" was. If you want to do so, say, to open the calcualtor and solder the ternminals, have a look here.

Success!


Possibly Related Threads…
Thread Author Replies Views Last Post
  HP-11C "horse racing" version Peter Murphy (Livermore) 2 1,694 08-12-2013, 07:34 PM
Last Post: rpn fan
  HP-11C and complex numbers Antlab 5 2,143 06-28-2013, 08:59 AM
Last Post: Antlab
  HP 11C Batteries have lasted 22 years nink 3 1,395 06-23-2013, 06:51 PM
Last Post: Les Koller
  Previously dead WP 34S is resurrected! JayV 2 1,255 04-18-2013, 12:41 AM
Last Post: Walter B
  Creeping black pattern on HP-11C screen Larry Gagnon 6 2,016 04-12-2013, 10:09 AM
Last Post: Peter Murphy (Livermore)
  Does anyone want dead 82001 battery packs? Michae Altmann 6 1,943 03-15-2013, 07:32 PM
Last Post: Harald
  Dead 50g after 3 months Chris Smith 13 3,127 03-13-2013, 12:28 PM
Last Post: chris smith
  The answer to the second semi-mathematical puzzle Mike Reed 3 1,402 02-18-2013, 02:40 AM
Last Post: Derek Walker (UK)
  More or less dead HP-67 Bernd Ulmann (Germany) 7 2,254 02-09-2013, 12:53 PM
Last Post: Ignazio Cara (Italy)
  OT: a semi mathmatical puzzle 4 u Mike Reed 6 1,977 02-05-2013, 07:50 PM
Last Post: Mike Reed

Forum Jump: