Question about NEC MobilePro 900 Handheld

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NEC MobilePro 900 lines in display

I purchased a used NEC MobilePro and, after trying it out by playing a game of Solitaire on it, vertical lines appeared, within 5 minutes, in the display after exiting the game. I have fully charged the unit overnight, replaced the backup battery with a new one, and have tried adjusting the display every way I could find to no avail. These weird vertical lines are lighter in the center of the screen and are red and green in color, and act like they are almost flickering. Going outward from the center, the lines go to black in color. The unit works great otherwise and I would like to keep it (I could possibly get a refund) if I can get someone's help in fixing the display (it is very difficult to see anything now on the screen). Thank you!

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It is probably due to loose ribbon connector that connects screen(top) to the motherboard(bottom). Try tapping the right hinge first.
Else (make sure to backup the computer before) examining this exposed ribbon connector under the right hinge, and depending upon how far one's knowledge and skill allows to go, by unseating and reseating this ribbon should take care of this situation. Very careful. Getting here could be fatal if not done right.

Posted on Jan 01, 2008

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The problem is most likely the LCD is dying

Posted on Jun 16, 2007

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Posted on Jan 02, 2017

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Display problem on NEC MobilePro 900


I just bought a 900C on eBay and had the same problem. According to the seller "the video cable on the right under the hinge cover gets loose..if its reseated it will be fine..you could just press on the bottom of the hinge cover right and it will make it go away but best to reseat the cable." I haven't tried his solution yet. Mine seems to intermittent since it is working fine right now.

May 30, 2007 | NEC MobilePro 900 Handheld

1 Answer

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Sep 14, 2005 | NEC MobilePro 900 Handheld

1 Answer

"Backup Battery Very Low"


NEC has identified an issue where the system can erroneously generate the "Backup Battery Very Low" message. There are two possible solutions that will eliminate this erroneous low battery warning message (the first method is the preferred solution, the second method can be used if the update file is not available). Solution I. Install a new version of the driver that controls the battery monitoring circuit. 1. Download the Low battery warning fix to your desktop. 2. Using ActiveSync or a compact Flash Card, copy FixBatt_HPC2K.EXE to the MobilePro internal disk. 3. On the MobilePro, double click the FixBatt_HPC2K icon. 4. When the message "Low Backup Battery Issue" is displayed, tap the "Patch it" button 5. When prompted turn unit over and momentarily depress the Reset button using the stylus. Solution II. Change the default power management configuration. Configure your MobilePro 900 to suspend when the LCD lid is closed on battery power and AC power. To ensure that the device suspends whenever the lid is closed, please make the following changes and perform a soft reset: 1. Go to Control Panel. 2. Open MobilePro Settings. 3. Go to the LCD Suspend/Resume tab. 4. Place a check next to "Enable suspend while on External Power." 5. Click the "Advanced" button and place a check next to "Enable suspend while on External power. 6. Click OK to close the Advanced Setting window and click OK to close the MobilePro Settings. 7. Turn unit over and momentarily depress the Reset button using the stylus. NOTE: Both the software update and power management settings are cleared on a hard reset and must be re-applied.

Sep 14, 2005 | NEC MobilePro 900 Handheld

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