Phillips 170C LCD monitor. No picture and all settings are at -1.

[Mad]

Any ideas.

I've had this 17" LCD monitor for three years plus with no problems what so
ever,

Untill today.

I turned the monitor on and then the PC and for some reason the initial
message was in chinese!
No signal!

This dissapeared and then all i had was a blank screen.

none of the buttons on the side worked, or they seemed not to work,

After a quick hunt 2~3 hours on the net, i mannaged to find that the OSD
was locked!

After unlocking the OSD (pressing and holding the ok button for 10 secs)

I reset the language to english and then reset the monitor to its factory
defaults.

Still nothing, (no display)

However the backlights are working ok as you can see the edge glow from all
four of them in the dark.

and the OSD is perfect,

there is no computer display even if you look across the LCD display.

I have plugged the monitor in to 2 other PC, still not working.

I have changed the resolution from 640*480 through to 1200*1024. none
display.

I have checked the cable from the PC to the monitor, all ok.

I then checked the OSD settings.

ALL OF THE SETTINGS, Colour, Brightness, R,G,B

have the value of -1 (minus one). normall in the range of 0 - 255

and you are not able to change any of these values!!

I have e-mailled phillips and have had no reply.

Any ideas?

Is there a service mode to this monitor?
can the monitor be completly reset?
any ideas as to where i can find a repair / service manual?

Thanks in advance

Mac.

 

[[email protected]]

It sounds like a problem with the controller board, not the inverter
board.
I would suggest you resolder all connections on this board, even the
solder-through holes where possible. These are usually multi-layer
boards and sometimes have inter-layer connection failures.

You might also look for a small 8-pin IC that begins with 24L or 24LC.
Many monitors store their setting in these flash eeproms. Sometines,
replacing one with a blank eeprom will fix the problem.

Phillips will probably not sell you parts for these monitors. You might
check EBay to try and locate a broken monitor.

Hope this helps...
John

 

[Mad]

It sounds like a problem with the controller board, not the inverter
board.
I would suggest you resolder all connections on this board, even the
solder-through holes where possible. These are usually multi-layer
boards and sometimes have inter-layer connection failures.

You might also look for a small 8-pin IC that begins with 24L or 24LC.
Many monitors store their setting in these flash eeproms. Sometines,
replacing one with a blank eeprom will fix the problem.

Phillips will probably not sell you parts for these monitors. You might
check EBay to try and locate a broken monitor.

Hope this helps...
John

Thanks'

I'll have a look for the eeprom.

Mac.

 

[tomh]

Phillips is one of those companies that have all but abandoned product
repair, documentation or service. Good Luck

 

[Mad]

It sounds like a problem with the controller board, not the inverter
board.
I would suggest you resolder all connections on this board, even the
solder-through holes where possible. These are usually multi-layer
boards and sometimes have inter-layer connection failures.

You might also look for a small 8-pin IC that begins with 24L or 24LC.
Many monitors store their setting in these flash eeproms. Sometines,
replacing one with a blank eeprom will fix the problem.

Phillips will probably not sell you parts for these monitors. You might
check EBay to try and locate a broken monitor.

Hope this helps...
John

Yup it was the eeprom,

I have managed to find an equivelent from RS.

£1 plus p&p.

I'm going to see and what philips quote me for a replacement chip.
should be interesting.

Mac.

 

[redart]

HI,
I know this is a long shot on a 4 year old thread, but I have the exact same problem with my Philips 170S4 and I just found this post.

"Yup it was the eeprom,
I have managed to find an equivelent from RS.
£1 plus p&p.
I'm going to see and what philips quote me for a replacement chip.
should be interesting.
Mac."

Did replacing the eeprom fix it ?. I also contacted Philips and they were less than helpful - "send it in for repair" was their only response!!. Yeah, worthwhile for a 6 yo monitor !

eeprom in mine is an ATMEL 24C16A. If this is corrupt, is there any way to wipe it clean ?. Thanks.