Question about Acer P191WBD LCD Monitor

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Magenta vertical stripe sets plus grid dots problem

My 7 month old Acer Monitor Model P191W started displaying 4, evenly spaced, magenta colored vertical stripe sets about an hour ago (May 13, 2009). Each of the sets contains 16 vertical stripes. There also are some dots in a few grid patterns in the same color. There also is some blue color to portions of the stripes and some of the dots. Acer's help line had me unplug the VGA cable and press Reset in the monitor menu, but that didn't help.

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Staples office supply store said it was the monitor and, after buying and installing a new $200 monitor, I discovered it wasn't the monitor. I brought my hard drive to a reputable computer repair place, who charged me $50 total to install a new video card. He also supped up my hard drive with an additional 512K ram for $20 and now things are so much better. You were right! It was the video card.

Posted on May 15, 2009

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  • Acer Master
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Try using a diffrent computer on this and see if its not the video card doing it or if not its the controller board inside that connect to the video card that would need to be replaced at this time, if there are no dead or stuck pixels it might be worth replacing rather then buying a new one.

Posted on May 14, 2009

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Posted on Jan 02, 2017

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Error sc 329


This is for a Ricoh copier. You did not indicate machine.

SC 329: Laser Beam Pitch Adjustment Error
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

The LD unit home position sensor does not detect an on condition while changing the LD unit position for correcting the LD position or changing the DPI.


Instructions from the Service Manual below...

.

5.4.3 LASER BEAM PITCH ADJUSTMENT
There are two laser beam pitch adjustment procedures: one for 400 dpi, and one
for 600 dpi. These adjustments use the following SP modes.
· SP2-109-1: Laser Beam Pitch Adjustment - 400 dpi
· SP2-109-2: Laser Beam Pitch Adjustment - 600 dpi
· SP2-109-3: Laser Beam Pitch Initial Setting - 400 dpi
· SP2-109-4: Laser Beam Pitch Initial Setting - 600 dpi
· SP2-902-2, no.12: IPU Test Pattern - Cross Stitch - 400 dpi
· SP2-902-2, no.13: IPU Test Pattern - Cross Stitch - 600 dpi

1. Perform SP2-109-8 (Beam Pitch Data Reset).

2. Input the value for 400 dpi that is printed on the LD unit into SP2-109-1.
Use the value printed after "P" on the new LD unit as shown below.
NOTE: Do not use values printed after a "V".

(These value numbers are on a sticker inside the machine with a UPC code on it. The numbers are just under the UPC barcode. And example number looks like this: "15980300151P: 120, 172", so the example 400 dpi value here is "120".)

3. Press the "Enter" key.

4. Perform SP2-109-3.

5. Print the 400-dpi test pattern onto A3 (11"x17") paper using SP2-902-2 no.12
(cross stitch). (See Service Tables - Test Pattern Printing - Section 4.2.3, pasted below.)

6. Write the value of SP2-109-1 on the test pattern which was input at step 2.

7. Change the value of SP2-109-1 and print another test pattern, repeating steps
2 to 5. Print about 5 patterns with different values for SP2-109-1 (e.g. "48", "96",
"192", "240").

8. Check this test pattern. If the laser beam pitch is not correct, the image looks
like a black vertical stripe pattern.
NOTE: If the laser beam pitch is correct, the vertical stripe is not so noticeable.
If the value is not correct, the vertical stripe pattern is darker.

9. Adjust the laser beam pitch position until the thin lines are of uniform thickness
(no striping effect should appear on the printout), doing steps 2, 3, and 4. (In
step 2, input a value which is estimated to be correct, then do steps 3 and 4,
then if necessary go back to step 2 and try another value.)

10. After adjusting the laser beam pitch for 400 dpi, adjust the laser beam pitch for
600 dpi, using the same procedure as for 400 dpi (use the SP modes for 600
dpi).

.

4.2.3 TEST PATTERN PRINTING (SP2-902)
NOTE: Do not operate the machine until the test pattern is printed out completely.
Otherwise, an SC may occur.

1. Access the SP mode which contains the test pattern you need.

2. Press exit, then touch the "Copy Mode" key on the operation panel to access
the copy mode display.

3. Select the paper size.

4. Press the "Start" key to print the test pattern.

5. After checking the test pattern, exit copy mode by touching the "SP Mode" key.
Reset the test pattern to 0.

6. Exit the SP mode.

.
Test Pattern Table (SP2-902-2: Test Pattern Printing - IPU)
No. Test Pattern
-
0 None
1 Grayscale 1
2 Grayscale 2
3 Grayscale 3
4 Grayscale 4
5 Grayscale 5
6 Vertical Lines (256-greyscale) 13 Cross Stitch (600 dpi)
7 Vertical Lines (1-dot)
8 Vertical Lines (2-dot)
9 Hatch Pattern
10 Cross Pattern
11 Slant Pattern
12 Cross Stitch (400 dpi)
.

Test Pattern Table (SP2-902-3: Test Pattern Printing - Printing)
No. Test Pattern
-
0 None
1 Vertical Line (1-dot)
2 Horizontal Line (1-dot)
3 Vertical Line (2 dot)
4 Horizontal Line (2-dot)
5 Grid Pattern (Single-dot)
6 Grid Pattern (Double-dot)
7 Alternating Dot Pattern
8 Full Dot Pattern
9 Black Band
10 Trimming Area
11 Argyle Pattern
12 16 Grayscales (Horizontal)
13 16 Grayscales (Vertical)
14 16 Grayscales (Vert./Hor.)
15 16 Grayscales (Vert./Hor Overlay)
16 Not used
17 Horizontal Line (1-dot)
18 Grid Pattern (Single-dot)
19 Grid Pattern (Double-dot)
20 Alternating Dot Pattern
21 Blank Page

.

These adjusments listed in the manual require removal of a service panel and mechanical adjustment of the laser mounts, so it should be done by a qualified technician.

However, these test procedures can indicate whether or not this is the problem with your printer.

Sep 05, 2012 | Office Equipment & Supplies

1 Answer

Flashing magenta screen, blue screen and shutdown


Your screen is bad more than likely. Try connecting another monitor to the computer. Borrow a monitor from a neighbor, friend, relative or co-worker and connect it to the computer. If the Borrowed monitor displays and works ok, then your original monitor is bad. If the Borrowed monitor displays the same as your original monitor, then the Video Card inside the computer is bad.

May 23, 2012 | Dell XPS 410 PC Desktop

1 Answer

Monitor displays wide vertical stripes/bands


That is the symptom of failed T-CON board (part of the LCD panel assembly, new panel will be needed), you can try reseating the ribbon connector on the LCD panel first.
This what T-CON board looks like:
http://s807.photobucket.com/albums/yy352/budm/LCD%20panel/


Apr 26, 2010 | Planar PT1814NUV 18.1 in. Flat Panel LCD...

1 Answer

Magenta Dots vertically on Left margin of page


That is referred to as a repeating defect...most likely caused by a defect on the magenta drum unit. Here is a link for information on how to repair this problem:

http://welcome.solutions.brother.com/BSC/public/us/us/en/faq/faq/000000/000200/000016/faq000216_016.html?reg=us&c=us&lang=en&prod=mfc9440cn_all&Cat=3

Jan 17, 2009 | Brother MFC-9440CN Laser Printer

2 Answers

SC 329 code Aficio 550


SC 329: Laser Beam Pitch Adjustment Error
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

The LD unit home position sensor does not detect an on condition while changing the LD unit position for correcting the LD position or changing the DPI.


Instructions from the Service Manual below...

.

5.4.3 LASER BEAM PITCH ADJUSTMENT
There are two laser beam pitch adjustment procedures: one for 400 dpi, and one
for 600 dpi. These adjustments use the following SP modes.
· SP2-109-1: Laser Beam Pitch Adjustment – 400 dpi
· SP2-109-2: Laser Beam Pitch Adjustment – 600 dpi
· SP2-109-3: Laser Beam Pitch Initial Setting – 400 dpi
· SP2-109-4: Laser Beam Pitch Initial Setting – 600 dpi
· SP2-902-2, no.12: IPU Test Pattern – Cross Stitch – 400 dpi
· SP2-902-2, no.13: IPU Test Pattern – Cross Stitch – 600 dpi

1. Perform SP2-109-8 (Beam Pitch Data Reset).

2. Input the value for 400 dpi that is printed on the LD unit into SP2-109-1.
Use the value printed after “P” on the new LD unit as shown below.
NOTE: Do not use values printed after a “V”.

(These value numbers are on a sticker inside the machine with a UPC code on it. The numbers are just under the UPC barcode. And example number looks like this: "15980300151P: 120, 172", so the example 400 dpi value here is "120".)

3. Press the “Enter” key.

4. Perform SP2-109-3.

5. Print the 400-dpi test pattern onto A3 (11”x17”) paper using SP2-902-2 no.12
(cross stitch). (See Service Tables - Test Pattern Printing - Section 4.2.3, pasted below.)

6. Write the value of SP2-109-1 on the test pattern which was input at step 2.

7. Change the value of SP2-109-1 and print another test pattern, repeating steps
2 to 5. Print about 5 patterns with different values for SP2-109-1 (e.g. “48”, “96”,
“192”, “240”).

8. Check this test pattern. If the laser beam pitch is not correct, the image looks
like a black vertical stripe pattern.
NOTE: If the laser beam pitch is correct, the vertical stripe is not so noticeable.
If the value is not correct, the vertical stripe pattern is darker.

9. Adjust the laser beam pitch position until the thin lines are of uniform thickness
(no striping effect should appear on the printout), doing steps 2, 3, and 4. (In
step 2, input a value which is estimated to be correct, then do steps 3 and 4,
then if necessary go back to step 2 and try another value.)

10. After adjusting the laser beam pitch for 400 dpi, adjust the laser beam pitch for
600 dpi, using the same procedure as for 400 dpi (use the SP modes for 600
dpi).

.

4.2.3 TEST PATTERN PRINTING (SP2-902)
NOTE: Do not operate the machine until the test pattern is printed out completely.
Otherwise, an SC may occur.

1. Access the SP mode which contains the test pattern you need.

2. Press exit, then touch the “Copy Mode” key on the operation panel to access
the copy mode display.

3. Select the paper size.

4. Press the “Start” key to print the test pattern.

5. After checking the test pattern, exit copy mode by touching the “SP Mode” key.
Reset the test pattern to 0.

6. Exit the SP mode.

.
Test Pattern Table (SP2-902-2: Test Pattern Printing – IPU)
No. Test Pattern
-
0 None
1 Grayscale 1
2 Grayscale 2
3 Grayscale 3
4 Grayscale 4
5 Grayscale 5
6 Vertical Lines (256-greyscale) 13 Cross Stitch (600 dpi)
7 Vertical Lines (1-dot)
8 Vertical Lines (2-dot)
9 Hatch Pattern
10 Cross Pattern
11 Slant Pattern
12 Cross Stitch (400 dpi)
.

Test Pattern Table (SP2-902-3: Test Pattern Printing – Printing)
No. Test Pattern
-
0 None
1 Vertical Line (1-dot)
2 Horizontal Line (1-dot)
3 Vertical Line (2 dot)
4 Horizontal Line (2-dot)
5 Grid Pattern (Single-dot)
6 Grid Pattern (Double-dot)
7 Alternating Dot Pattern
8 Full Dot Pattern
9 Black Band
10 Trimming Area
11 Argyle Pattern
12 16 Grayscales (Horizontal)
13 16 Grayscales (Vertical)
14 16 Grayscales (Vert./Hor.)
15 16 Grayscales (Vert./Hor Overlay)
16 Not used
17 Horizontal Line (1-dot)
18 Grid Pattern (Single-dot)
19 Grid Pattern (Double-dot)
20 Alternating Dot Pattern
21 Blank Page

.

These adjusments listed in the manual require removal of a service panel and mechanical adjustment of the laser mounts, so it should be done by a qualified technician.

However, these test procedures can indicate whether or not this is the problem with your printer.

Dec 12, 2008 | Xerox WorkCentre 490CX All-In-One InkJet...

1 Answer

Striped color distortions on Nokia 300 Xa flat panel


This is power supply problem.
1. First u replaced the power out put capacitors , 6V, 12V, etc.
2. cheak the diodes.

Oct 17, 2008 | Computers & Internet

1 Answer

The magenta & blue rollers on our Epson Aculaser C900 are printing in stripes.


quick check

1. are you running out of toner magenta and blue??

2. remove magenta and blue, shake them gently HORIZONTALY to evenly distribute the toner inside (the toner container internally has a spade that feeds the toner dust to a spongy roller then to the roller u see on the outside :) )). DON'T HANDLE THE TONER CARTRIDGE VERTICALLY ---ESPECIALLY WHEN U ARE LOW ON INK---

3. on photo conductor read my article
http://www.fixya.com/support/t146110-epson_aculaser_c900_photoconductor

May 02, 2008 | Epson AcuLaser C900 Printer

1 Answer

Color Problems


I know this contribution might be late, but try to avoid using the auto white balance. Use a tungsten mode and test each of its compensations until you get the desired result. I haven't had a similar problem on the 14n, but my D100 always places a magenta cast on white when shooting auto WB. I learned how to adapt the other WB modes to any situation.

Sep 13, 2005 | Kodak DCS 14n Digital Camera

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