LCD Tech: LCD Monitor Testing

Last Updated on October 1, 2024 by

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LCD Test Cheat Sheet

INTENDED AUDIENCE: LCD Tech

PURPOSE: The purpose of this S.O.P. is to illustrate how to test PC Monitors,

Having Questions? Ask your supervisor before doing anything.

Prepare your tools, supplies & work area

• Workbench: clear any previous items you are no longer working on, set up the tools you will need.
• Screw Driver
• Measure Tape.
• Clean Cloth: to wipe down monitors with.
• Windex or surface cleaner: Do not spray directly on the screen, apply the solution onto the cloth then wipe down the screen.
• Put away the cart.
• All types of LCD AC adapters and power cords.
• Move LCD to be a test vessel in your area.

Testing

• Choose a monitor brand from giving options. If not an option, use other. 

 

• Remove Asset Tag. Check for all sides of the monitor. Check for and remove any Asset Tags on the LCD monitors

 

• Check screen condition.

Is it cracked, damaged, or intact? Cracked or damaged LCDs will be scrapped.

 

 

• Check all port for physical damage.

Monitor that included damaged port will be scrapped.

• Check included stand or not 

Do not remove stand for good LCD monitor.

• Choose screen size of monitor. How to measure screen size? see picture. Only measure screen not bezel.

• Wipe clean screen.

Wipe down the LCD screen with Windex or surface cleaner to remove any grease or gunk, minor scuffs can also be removed with a simple wipe.  (Do not wipe the case or stand unless they are extremely dirty, just the screen)

 Do NOT spray the solution directly onto the LCD – it can run down the LCD screen, and cause damage to electronic components behind the bezel; instead, spray a little on the cloth, then rub the screen gently.

• Identify Power Requirement.

Identify the power requirements for the monitor e.g standard power cord or Mickey mouse. or if a power supply is required, use the AC adapter from the test AC adapter bin for testing only.

• • Standard Power Cord:
  • 3 Prong Power Cord (Mickey Mouse):
  • 2 Prong Power Cord:

 

• Does the screen power on? 

If the monitor does not power on, it will be scrapped.

• Choose Screen Condition Grade

Grade A: 
Fully functional, no deep scratches on the body, no cracks, no paint chips, no broken/missing pieces, no dead pixels, no scratches on screen, no dark spots on screen, no light defusion. (like new condition)
=====================================================================

Grade B:
Fully functional: Light scratches on body, small paint chips, minor cracks on body, loose/wobbly base
Scratches: Light scratch on screen no longer than 1 inch,
Spots: Dark spots on the screen no bigger than .5 of an inch in diameter,
Diffusion: Uneven light diffusion, 
Dead Pixels: No more than 2 dead pixel.
=====================================================================

Grade C: 
Fully functional, multiple scratches on body, large paint chips, large cracks on the body, loose/wobbly base,
Scratches: light scratches on screen up to 3 inches,
Spots: dark spots on the screen that exceed .5 inch in diameter,
Diffusion: Uneven light diffusion,
Dead Pixels: no more than 5 dead pixels.
Other Criteria: One deep heavy scratch or bump less then 3″ long is a good monitor grade C, Fully functional monitor but has 3 major defects.
=====================================================================

Grade D:
Does not work. Cracked. Damaged. Scrap.
=====================================================================
If you have to look too hard to find an imperfection on the screen, that makes it grade C or better, its a keeper.

No more than 5, 1/2″ dark spots or pressure points for Grade C or above..

No more than 3 scratches less than 2 inches per scratch for Grade C or Above.

Most of our working monitors will be grade B or C.

By default, just choose all monitors condition as Grade B

• Print out test label.

Print 2 labels for good monitor

 

Print 1 label for scrap monitor.

• Put Monitor at pending area.

Put Away

• Bundle Monitors

Bundle together  monitors with same shape, and screen size face to face this will prevent damage to the screens. Tape the monitors together, do not tape over LCD screen, buttons, manufacturer label or the test sticker you just applied. Tape monitors with stands together and monitors without stands together, avoid mix-matching.

 

• Put LCD in wholesale vessel by size. LCD Testing & Put Away Requirements

17” LCD MONITOR WHOLESALE

19” LCD MONITOR WHOLESALE

20”-23″ LCD MONITOR WHOLESALE

24″ LCD MONITOR WHOLESALE

27″ LCD MONITOR WHOLESALE

If the size you have is not fit any wholesale vessel, choose the closest small size. For example, if you have a 18″ LCD monitor, then choose 17” LCD MONITOR WHOLESALE.

• Put second label on a sheet. Place Sheet in front of vessel.

Put w/stand labels on one sheet, w/o stand labels on another sheet. Easy for you to count LCDs later.

Wholesale Gaylord Sheet

• Layer check

When each layer is full, print LCD Layer label and fill it out then call supervisor for layer check. After layer check, use scrap stretch wrap or packing foam to fill the gap. Layer check is important, Do not forget.

• Weight

When wholesale vessel. is full, push it on scale. print 2 labels for weight, total LCD QTY, QTY w/stand and w/o stand. Place label one both front and back side of wholesale vessel.

• Replace Wholesale vessel.

LCD Testing & Put Away Requirements

• Scrap LCD Monitors

Scrap LCD Monitors will go to #1018 SCRAP: LCD/LED FLAT SCREEN MONITOR

Scrap LCD TVs will go to #1120 SCRAP: FLAT SCREEN TV

Remove stand and cable for scrap LCD monitor.

• LCD for eBay (Do not tape the LCD monitors for eBay.)

Touch Screen Monitor

Less 15″

Larger than 27″

Television

LCDs for eBay will go to  #1068 EBAY: LCD MONITOR & TV

Notify your supervisor when you are done with assigned task.

AVG. Speed for Testing: 10 per hour.

 

FAQ

Q: Is it ok to put add Stands to Dell Monitors without

A: Yes,

Note: if you grab from snap on/off stand gaylord, adjust quantity

Q: How to identify TV?

A: TV has antenna port, LCD monitor does not.