Samsung LH98QMFPBGCEN User Manual page 105

Other issue
The IR sensor is not functioning.
When booting the PC with the input source set to
DisplayPort1, DisplayPort2, the BIOS and booting screens
do not appear.
Make sure the sensor light turns on when a button is pressed on the remote control.
If the sensor light does not turn on, turn the power switch off and then on again on the back
of the product.
(The power LED lights up red when the screen is switched off.)
If the sensor light still does not turn on after the power switch is turned off and then on
again, an internal jack may be disconnected.
Contact your nearest service Center to have the product serviced.
If the sensor light that is on does not flash red when a button is pressed on the remote
control, the IR sensor may be defective.
Contact your nearest service center to have the product serviced.
This function is available only when a source device, such as a DVD player and STB, is
connected to the product via an HDMI (RGB signal) cable.
Boot the PC when the set is turned on or when the input source is not DisplayPort1,
DisplayPort2.
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