s25bt@gandalf.Berkeley.EDU (Keith Kong) (11/08/90)
Several posts back, someone mentioned about a replacement 48SX displaying weird lcd behavior which can be likened to what you see when you turn off the tv. Well, my newly bought 48SX showed the same type of problem. I was fiddling with the on-D <- sequence, when suddenly, when I pressed the 8 key, zap! The screen was flooded with on pixels which slowly disappeared, leaving the screen blank. I had to do a on-C to get back, but once I got back, everything was working normally. Further experiments indicate that there's nothing special about 8, but the lcd blanking was limited to on-D <- sequence followed by keys which changed the address display. However, a few minutes later, when I repeated the on-D <- sequence, no ununsual lcd behavior showed up. Has anybody else's 48SX displayed this screen blanking effect? I'd hate to see this happen in the middle of an exam! Keith Kong
rsholmes@rodan.acs.syr.edu (Rich Holmes) (11/08/90)
In article <39442@ucbvax.BERKELEY.EDU> s25bt@gandalf.Berkeley.EDU (Keith Kong) writes: >the on-D <- sequence, no ununsual lcd behavior showed up. Has >anybody else's 48SX displayed this screen blanking effect? I'd >hate to see this happen in the middle of an exam! Helpful Hint #386: Do not do the on-D <- sequence in the middle of an exam. You're welcome. :-) -- - Rich Holmes rich@suhep.bitnet Syracuse U. Physics Dept. rich@suhep.phy.syr.edu or if you must: rsholmes@rodan.acs.syr.edu
byu@csri.toronto.edu (Benjamin Yu) (11/08/90)
In article <39442@ucbvax.BERKELEY.EDU> s25bt@gandalf.Berkeley.EDU (Keith Kong) writes:
# Several posts back, someone mentioned about a replacement 48SX
# displaying weird lcd behavior which can be likened to what
# you see when you turn off the tv. Well, my newly bought 48SX
# showed the same type of problem. I was fiddling with the on-D
# <- sequence, when suddenly, when I pressed the 8 key, zap!
# ......
Some weeks/months ago, someone else mentioned about displaying a graphic
object and noticed one corner starting to fade away. A follow up post
mentioned that HP realized that it was a defect in older LCD (or something
like that) and replaced it. What surprises me is that my newly replaced
Rev E 48SX seems to still have similar problem!
Benjamin Yujmorriso@ee.ubc.ca (John Paul Morrison) (11/09/90)
IF I understand the descriptions of the LCD problem, there is probably no problem. In article <39442@ucbvax.BERKELEY.EDU> s25bt@gandalf.Berkeley.EDU (Keith Kong) writes: # Several posts back, someone mentioned about a replacement 48SX # displaying weird lcd behavior which can be likened to what # you see when you turn off the tv. Well, my newly bought 48SX # showed the same type of problem. I was fiddling with the on-D # <- sequence, when suddenly, when I pressed the 8 key, zap! # ...... When you fiddle with the on-D <- sequence, you are entering the HP's memory debugger/tester. I won't go into detail, but it is possible to alter the HP's LCD voltages, which can produce a disturbing but basically harmless effect. (HP describes a possible reliability problem if you do this frequently). Basically, stay out of the debugger. If you are getting weird LCD melting or bleeding, but you are NOT fiddling with the debugger, or some kind of POKE program, then you have a problem, but that's what customer service numbers are for.
byu@csri.toronto.edu (Benjamin Yu) (11/09/90)
In article <1990Nov8.105717@ee.ubc.ca> jmorriso@ee.ubc.ca writes: # IF I understand the descriptions of the LCD problem, there is probably # no problem. # # In article <39442@ucbvax.BERKELEY.EDU> s25bt@gandalf.Berkeley.EDU (Keith # Kong) writes: # # Several posts back, someone mentioned about a replacement 48SX # # displaying weird lcd behavior which can be likened to what # # you see when you turn off the tv. Well, my newly bought 48SX # # showed the same type of problem. I was fiddling with the on-D # # <- sequence, when suddenly, when I pressed the 8 key, zap! # # ...... # # When you fiddle with the on-D <- sequence, you are entering the HP's # memory debugger/tester. # ..... Sure, Keith was fooling around with the debugger and got the funny screen fading. That's no surprise. But I get that everytime I power on! The more I use it, the more I think I need another replacement!! Benjamin Yu