Black dot on top left corner and center of photos

Turn off Garmin. Pres top left screen and hold. While holding, turn unit on but keep holding corner. Once the black dot shows up again, use the eraser part of a pencil to chase the dot. That would give exact measurements. Your fingers may be wet or too large and are offsetting the screen area readings. Good Luck

No that is not a problem, it is quite normal and nothing to worry about. The dot indicates battery condition.

To calibrate the touchscreen on your nuvi 200 series follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Slide the power switch to the ON position and hold for about 45 seconds.
3. A message will display on the screen: Press Dot.
4. Once this message displays, release the Power button.
5. Press in the center of the Dot.
6. Keep pressing in the center of the Dot as it moves around the screen.
7. Once this is complete, there will be a message: Calibration Complete.
8. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.
*Note if unit is running software version 6.00 or newer you will want to follow steps from below.

To calibrate the touchscreen on your nuvi 205 series follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Place your finger in the top left hand corner of the touch screen and apply pressure.
3. Slide the power switch to the ON position. Once unit powers on release the power button.
4. Hold pressure in left corner until the Press dot message appears.
5. Once this message displays, remove your finger from the screen.
6. Press in the center of the Dot.
7. Keep pressing in the center of the Dot as it moves around the screen.
8. Once this is complete, there will be a message: Calibration Complete.
9. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.

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You are simply moving the dot out of the field of view.

The Aimpoint is set up to allow you to hit now matter where in the field of view the dot appears. High, low, right, left, it doesn't matter. If you can place the dot on target, your bullet will hit where the dot appears. Too much angle away from the center will move the dot out of your field of view however, This is apparently what is happening to you.

It needs to be calibrated
To calibrate the touchscreen on your nuvi 200W follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Slide the power switch to the ON position and hold for about 45 seconds.
3. A message will display on the screen: Press Dot.
4. Once this message displays, release the Power button.
5. Press in the center of the Dot.
6. Keep pressing in the center of the Dot as it moves around the screen.
7. Once this is complete, there will be a message: Calibration Complete.
8. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.
*Note if unit is running software version 6.00 or newer you will want to follow steps from below.
To calibrate the touchscreen on your nuvi 205 series follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Place your finger in the top left hand corner of the touch screen and apply pressure.
3. Slide the power switch to the ON position.
4. Hold pressure in left corner until the Press dot message appears.
5. Once this message displays, remove your finger from the screen.
6. Press in the center of the Dot.
7. Keep pressing in the center of the Dot as it moves around the screen.
8. Once this is complete, there will be a message: Calibration Complete.
9. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.

you will need to do a screen calibration. to do this.

press and HOLD the top left hand corner of the screen while sliding and holding the power switch in the on position. Hold bothe for about a minute and eventually a white screen will appear with a black dot which will say press here touch that dot and the following dots that appear until you get a message saying that calibration is complete.

you should no longer have that problem

Your touch display is shorting out....BAD
Replace Unit
BUT try this first:
Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} To recalibrate the touchscreen on your nuvi 200 series follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Slide the power switch to the ON position and hold for about 45 seconds.
3. A message will display on the screen: Press Dot.
4. Once this message displays, release the Power button.
5. Press in the center of the Dot.
6. Keep pressing in the center of the Dot as it moves around the screen.
7. Once this is complete, there will be a message: Calibration Complete.
8. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.
*Note if unit is running software version 6.00 or newer you will want to follow steps from below.
To recalibrate the touchscreen on your nuvi 205 series follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Place your finger in the top left hand corner of the touch screen and apply pressure.
3. Slide the power switch to the ON position.
4. Hold pressure in left corner until the Press dot message appears.
5. Once this message displays, remove your finger from the screen.
6. Press in the center of the Dot.
7. Keep pressing in the center of the Dot as it moves around the screen.
8. Once this is complete, there will be a message: Calibration Complete.
9. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.

Does this help? Let me know. Thank you...

There is more than one calibration procedure, but for the 200 it is:
Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} To recalibrate the touchscreen on your nuvi 200 follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Slide the power switch to the ON position and hold for about 45 seconds.
3. A message will display on the screen: Press Dot.
4. Once this message displays, release the Power button.
5. Press in the center of the Dot.
6. Keep pressing in the center of the Dot as it moves around the screen.
7. Once this is complete, there will be a message: Calibration Complete.
8. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.
*Note if unit is running software version 6.00 or newer you will want to follow steps from below.
To recalibrate the touchscreen on your nuvi 205 series follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Place your finger in the top left hand corner of the touch screen and apply pressure.
3. Slide the power switch to the ON position.
4. Hold pressure in left corner until the Press dot message appears.
5. Once this message displays, remove your finger from the screen.
6. Press in the center of the Dot.
7. Keep pressing in the center of the Dot as it moves around the screen.
8. Once this is complete, there will be a message: Calibration Complete.
9. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.

If this doesn't work you have two choices
Buy a new one
Or
Send your in for repair. Go here for this option
http://www8.garmin.com/support/outofwarranty.html

Are you sure you pressed the correct location on your screen???
If so, you may need to calibrate the screen.
Do this:
Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} To recalibrate the touchscreen on your nuvi 200 series follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Slide the power switch to the ON position and hold for about 45 seconds.
3. A message will display on the screen: Press Dot.
4. Once this message displays, release the Power button.
5. Press in the center of the Dot.
6. Keep pressing in the center of the Dot as it moves around the screen.
7. Once this is complete, there will be a message: Calibration Complete.
8. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.

*Note if unit is running software version 6.00 or newer you will want to follow steps from below.
To recalibrate the touchscreen on your nuvi 205 series follow the steps below:

1. Have the unit turned OFF and unplugged from power.
2. Place your finger in the top left hand corner of the touch screen and apply pressure.
3. Slide the power switch to the ON position.
4. Hold pressure in left corner until the Press dot message appears.
5. Once this message displays, remove your finger from the screen.
6. Press in the center of the Dot.
7. Keep pressing in the center of the Dot as it moves around the screen.
8. Once this is complete, there will be a message: Calibration Complete.
9. Touch Ok and the unit will restart.

The touchscreen will now be recalibrated.

my sony is 4yrs also it has blue dots on the left side from top to bottom and a blue blob on rt. bottom corner no longer under warr. please send repair solution.