Notes on the Diagnosis and Repair of Computer and Video Monitors INDEX V2.20 (3/26/96)

	Table of Contents
	Chapter 1) About the Author
	Chapter 2) Introduction
	2.1) Monitors, monitors, and more monitors
	2.2) Related Information
	2.3) Monitor fundamentals
	2.4) Monitor characteristics
	2.5) Types of monitors
	2.6) Why multiscan?
	2.7) Analog vs. digital monitors
	2.8) Interlacing
	2.9) Monitor performance
	2.10) Performance testing of monitors
	2.11) Monitor repair
	2.12) Most Common Problems
	2.13) Repair or replace
	Chapter 3) Monitors 101
	3.1) Subsystems of a monitor
	3.2) For more information on monitor technology
	Chapter 4) CRT Basics
	4.1) Color CRTs, Shadowmasks, Magnetic Fields, and Degauss
	4.2) Color CRT resolution - focus and dot/slot/line pitch
	4.3) Why is the shadowmask or aperture grill made of a magnetic material?
	4.4) Tubes for all Nations
	4.5) Degaussing (demagnetizing) a CRT
	4.6) How often to degauss
	4.7) Why are indirectly heated cathodes used in CRTs
	4.8) Why are there fine lines across my Trinitron monitor or TV?
	4.9) Scratches in CRT face
	Chapter 5) Monitor Placement and Preventive Maintenance
	5.1) General monitor placement considerations
	5.2) Preventive maintenance (PM)
	5.3) Monitor tuneup?
	Chapter 6) Monitor Troubleshooting
	6.1) Safety
	6.2) Safety Guidelines
	6.3) Troubleshooting tips
	6.4) Test equipment
	6.5) Incredibly handy widgets
	6.6) Safe discharging of capacitors in TVs and video monitors
	6.7) The series light bulb trick
	6.8) Getting inside a monitor
	6.9) Dusting out the inside of a monitor
	Chapter 7) Monitor Adjustments
	7.1) User picture adjustment
	7.2) Focus adjustment
	7.3) Brightness and color balance adjustment
	7.4) Position, size, and linearity adjustment
	7.5) Pincushion adjustments
	7.6) Geometry adjustment
	7.7) Why is the convergence on my monitor bad near the edges
	7.8) CRT purity and convergence problem
	7.9) CRT purity adjustment
	7.10) CRT convergence adjustment
	7.11) Tilted picture
	Chapter 8) Low Voltage Power Supply Problems
	8.1) Low voltage power supply fundamentals
	8.2) Monitor deflection derived power supply faults
	8.3) Power button on monitor is flakey
	8.4) Monitor blows fuse
	8.5) Internal fuse blew during lightening storm (or elephant hit power pole)
	8.6) Fuse replaced but monitor clicks with power-on but no other action
	8.7) Power-on tick-tick-tick or click-click-click but no other action
	8.8) No picture but indications of power
	8.9) Monitor mostly dead, possible whine from power supply
	8.10) Reduced width picture and/or hum bars in picture
	8.11) Dead monitor with periodic tweet-tweet-tweet or flub-flub-flub
	8.12) Monitor power cycling on and off
	8.13) Shorted Components
	8.14) Startup problems - nothing happens, click, or tick-tick-tick sound
	8.15) Monitor turns off after warming up
	8.16) Monitor doesn't power up immediately
	8.17) Old monitor requires warmup period
	8.18) Power supply interactions
	8.19) Relays in the Power Circuitry of monitors
	8.20) What is a posistor?
	8.21) Flameproof Resistors
	Chapter 9) Deflection Problems
	9.1) Deflection fundamentals
	9.2) Gross problems in size or position at certain scan rates
	9.3) Can incorrect or missing video damage my monitor?
	9.4) Why are nearly all horizontal drivers circuits transformer coupled?
	9.5) Picture squeezed in then died
	9.6) Horizontal deflection shutting down
	9.7) Horizontal lock lost
	9.8) Horizontal squashed
	9.9) Monitor Non-linearity
	9.10) Vertical squashed
	9.11) Picture size changing
	9.12) Replicated or offset multiple images
	9.13) Part of picture cut off
	9.14) Bright blurry bars on edge of picture
	9.15) Single Vertical Line
	9.16) Single Horizontal Line
	9.17) Loss of horizontal sync (also applies to vertical) after warmup
	9.18) Intermittent jumping or jittering of picture or other random behavior
	9.19) Horizontal output transistors keep blowing
	9.20) Vertical foldover
	9.21) Pincushioning Problems
	9.22) Testing of flyback (LOPT) transformers
	Chapter 10) High Voltage Power Supply Problems
	10.1) HV power supply fundamentals
	10.2) What is a tripler?
	10.3) Low or no high voltage
	10.4) Excessive high voltage
	10.5) Arcing, sparking, or corona from CRT HV anode (red wire/suction cup)
	10.6) Arcing at CRT sparkgaps
	10.7) Arcing from flyback or vicinity
	10.8) Ozone smell and/or smoke from monitor
	10.9) X-ray and other EM emission from my monitor?
	10.10) Should I be worried about X-ray exposure while servicing a TV or monitor?
	10.11) Flyback got wet
	10.12) Blooming or breathing problems
	Chapter 11) Raster, Color, and Video Problems
	11.1) Blank picture, power light on, digital controls (if any) active
	11.2) No color - black and white picture
	11.3) Psychodelic color
	11.4) Monitor manufacturing quality and cold solder joints
	11.5) Intermittent, flickering, or Missing Colors
	11.6) Ghosts, shadows, or streaks in picture adjacent to vertical edges
	11.7) General streaks or lines to the right of bright or dark areas
	11.8) Washed out picture
	11.9) Red, green, or blue full on - fog over picture
	11.10) Providing isolation for a CRT H-K short
	11.11) Rescuing a shorted CRT
	11.12) Brightening an old CRT
	11.13) Bleeding highlights
	11.14) Trailing lines on one or more colors
	11.15) Purity problems with bright pictures
	11.16) Why is the brightness so non-uniform in bright areas?
	11.17) Brightness changes from left-to-right across screen
	11.18) Picture fades in and out
	11.19) Occasional brightness flashes
	11.20) Occasional static, lines, spots, or other unsightly blemishes
	11.21) Flickering monitor
	11.22) Excessive brightness and/or washed out picture
	11.23) Focus problems
	11.24) Bad focus (fuzzy picture)
	11.25) Focus drift with warmup or age
	11.26) Bad focus and adjustment changes brightness
	11.27) Purple blob - or worse
	11.28) Color monitor only displays one color
	11.29) Disappearing Red (or other color)
	11.30) Interference from Electrical Wiring
	11.31) Interference from other Equipment
	11.32) My monitor is possessed!
	11.33) Jittering or flickering due to problems with AC power
	11.34) My monitor has the shakes
	11.35) Loss of color after warmup
	Chapter 12) Miscellaneous Problems
	12.1) Contour lines on high resolution monitors - Moire
	12.2) Isolated spots on display
	12.3) Power saving problems
	12.4) Monitor Drift?
	12.5) Monitor shuts down or goes blank at certain scan rates
	12.6) Monitor flickers when disk accessed
	12.7) Buzzing monitor
	12.8) High pitched whine or squeal from monitor with no other symptoms
	12.9) Monitor was rained on
	12.10) Monitor was dropped
	12.11) Setup menus will not go away or hieroglyphics on screen
	12.12) Setup Adjustments Lost
	12.13) Monitor doesn't work after being in storage
	12.14) Cheap monitors with multiple intermittent problems
	12.15) Monitor has burning smell
	12.16) Loudspeakers and monitors
	12.17) Should I replace all the electrolytic capacitors if I find a bad one?
	12.18) Black powder being generated inside monitor?
	12.19) Sweet little old ladies and TVs from attic
	12.20) Disposing of dead monitors (CRTs and charged HV capacitors)
	12.21) Apple Monitor Dies after variable length of time
	Chapter 13) Items of Interest
	13.1) Monitor Reliability with SVGA
	13.2) Should I be concerned about very frequent scan rate switching
	13.3) Tony's notes on setting convergence on delta gun CRTs
	13.4) Use of surge suppressors and line filters
	13.5) GFCI tripping with monitor (or other high tech equipment)
	13.6) Monitors on foreign power
	13.7) Lifespans of Monitors
	13.8) Monitor life, energy conservation, and laziness
	13.9) About sync polarity options
	13.10) Identifying connections on unknown or cut monitor cables
	13.11) CRT Replacement - probably not worth it
	13.12) An informal history of X-ray protection
	13.13) Turning a TV (or monitor) into an oscilloscope?
	13.14) Displaying a video signal as a picture on an oscilloscope
	13.15) Could a monitor be modified for 3D (stereo) display?
	13.16) Using a workstation monitor on a PC
	13.17) Displaying TV on a computer monitor
	13.18) Displaying computer video on a TV
	13.19) What is Kell factor with respect to interlaced displays?
	13.20) Weird phenomenon of the month
	13.21) Ultra cheap degaussing coil
	13.22) Big Al's rules of thumb on monitor repair
	13.23) Tic-Toc Tips
	13.24) Monitor service and how to get some
	Chapter 14) Repair Information and Parts Sources
	14.1) Advanced monitor troubleshooting
	14.2) Additional information
	14.3) Suggested references
	14.4) Parts information
	14.5) Information sources on the Internet
	14.6) Interchangeability of components
	14.7) Repair parts sources