Electronics Forum / Repair / March 2005

Could anyone offer any guidance with a faulty Mac G4 Titanium laptop
please:-
Normally no boot up or display but will very occasionally boot up and says"
cache memory faulty", will then load up the desktop but freezes to death!!

this VCR acts funny, I cannot get it in REW or SEARCH backward, when the
reverse functions are activated it spools forward...

i have a noname car stereo which is looping up various tapes
the tape, instead of going nicely around the takeup reel will loop
around the supply reel.
i opened it up to see how it works

it's panasonic color set, 15 years old.  i have cable and watch the
cable channels thru my vcr.
my TV is prone to turning into snow a few minutes after I turn it on.
turning it off and on again solves it.

I have an older Sony stereo unit (radio-tape-CD-video input.)
The CD  player has developed an intermittent problem.
You insert a disk, it shows TRACK 1 on the display but then it ejects the
disk.

........
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braincambre500

Hello Guys/Girls
LCD panel, when I press the BNC/D-SUB on the front panel of the monitor
I could see the output from the computer for about 3-5 seconds. with
Perfection.

I am asking for help in getting educated in voltage regulators for small gas
engines.  Here, I'm speaking of the kind that have a starter unit separate
from the alternator.
I'm getting all sorts of mixed signals as to what will or won't work with my

Anyone know of a source for sub-miniature momentary, position-indicating
toggle or slide switches with the following logic, to be used to trigger
twin-coils (ON) and hold position indicating LEDs ON?
 (ON)-ON-ON-(ON)

Hi hope some one can help me out., I am looking for a schematic for a
Toshiba T.V. model 20A43 chassis # M3M914 its about 2 years old and
turns its self off with out warning at random times. I need the
schematic to check voltages, I'm sure the (P.S) is where the problem is.

Looking at this monitor and when power is applied, the green power led
lights and then turns amber and flashes at 0.5 sec intervals.  No HV crackle
or static on screen, no heater glow, etc.  I have used an iso-xformer to
check some voltages and the B+ (180vdc) supply comes up and ...

http://members.cox.net/carbuy2004/images/IMG_8239.JPG
Problem: I get these multi-colored (red, blue, green) horizontal lines
across the screen when I boot up. Sometimes I can get into windows,
sometimes it "crashes"/resets the computer right when I get to the

Got a weird problem with my TOSHIBA TV 20AF42.
It keeps shutting off...
Is this some sort of power problem ?
Would really appreciate any help !

I have a KP43T75 that has been working great for about 4 years now unti
this week. I noticed a little bit of color distortion every once i
awhile for a few days and then last night it just buzzed for a coupl
seconds and then shut off. It would not turn on at all. I cycled th

Hi, I am reparing a Toshiba tv cx28600 with vertical a output problem..white
horizontal bar across screen..I will have to change the vertical ic
AN5521....does anyone know which caps  will also have to be changed with
this ic so the problem does not reoccur