It certainly sounds like an isse with the LCD. Have you noticed this problem happening while connected to an external monitor, if it it cabling in the chassis then it may effect both the LCD and the external monitor alike. The thing about this that concerns me is the video going out or is the system shutting down when this happens? Have you tried reseating the keyboard making sure that the keyboard cable is secure? TB
Thanks for the reply Terry. Externally connected devices are not affected - monitor, projector, etc. The system does not shut down. The screen just goes black and then comes back on. The computer is responsive and in fact I can keep right on typing (including several times during this message) and it keeps right on going.
It is reproducible error and so it the "fix". I just press "the spot" (1/2" - 1" below the left ctrl key) and it comes back on. I have tried changing the LCD angle, turning the computer sideways, upside down, closing/opening, etc. Nothing gets it back on except pressing the spot or holding it by the bottom left corner. Works every time. There is no rhyme or reason that I can tell when it goes off. It does it sitting flat on a table, yet doesn't right now sitting on the couch at an angle. The only thing I can figure is that something is loose but I'm not sure what.
I have checked the keyboard cable, taken it off and put it back on. Good connection, all keys work, no issues. Did the same with the LCD cable where it is connected to the MB. I have not pulled the LCD apart but moving the cable where it goes into the LCD has no affect positive or negative.
It's almost like the LCD backlight is turning off? Could that be it?
Been reading quite a bit about the backlight and inverter. My experience is similar to a number of those posts. Where is the power lead from the MB that goes to the inverter? Anywhere near the left Shift-Ctrl-Z-X-C-Alt keys? Could that be the culprit?
Using a flashlight I can still see a faint image on the screen when it goes black.
I looked up on the service manual, and the connection for the data cable that leads from the system board / video card to the LCD just happens to be near where you are talking about. So there can certainly be a bad connection there. I am going to shoot you a DM for your contact info and if the system is still under warrnaty set up a dispatch to correct this. If the system is not under warranty you will need to remove the keyboard unfortunatly to be able to get at the connector. I would try reseating the cable and see if that corrects the problem.
I have a 1525 with the same issue. It goes black and comes back with no reason. It usually is just sitting there not being touched. I cannot seem to make it go off or come back on. It just randomly does it.
Any fix for this yet? Did you narrow it down to a connection or the LCD itself?
DELL-Terry B
4 Operator
•
3.5K Posts
0
December 1st, 2010 17:00
It certainly sounds like an isse with the LCD. Have you noticed this problem happening while connected to an external monitor, if it it cabling in the chassis then it may effect both the LCD and the external monitor alike. The thing about this that concerns me is the video going out or is the system shutting down when this happens? Have you tried reseating the keyboard making sure that the keyboard cable is secure? TB
zonewolf
3 Posts
0
December 2nd, 2010 20:00
Thanks for the reply Terry. Externally connected devices are not affected - monitor, projector, etc. The system does not shut down. The screen just goes black and then comes back on. The computer is responsive and in fact I can keep right on typing (including several times during this message) and it keeps right on going.
It is reproducible error and so it the "fix". I just press "the spot" (1/2" - 1" below the left ctrl key) and it comes back on. I have tried changing the LCD angle, turning the computer sideways, upside down, closing/opening, etc. Nothing gets it back on except pressing the spot or holding it by the bottom left corner. Works every time. There is no rhyme or reason that I can tell when it goes off. It does it sitting flat on a table, yet doesn't right now sitting on the couch at an angle. The only thing I can figure is that something is loose but I'm not sure what.
I have checked the keyboard cable, taken it off and put it back on. Good connection, all keys work, no issues. Did the same with the LCD cable where it is connected to the MB. I have not pulled the LCD apart but moving the cable where it goes into the LCD has no affect positive or negative.
It's almost like the LCD backlight is turning off? Could that be it?
zonewolf
3 Posts
0
December 2nd, 2010 21:00
Been reading quite a bit about the backlight and inverter. My experience is similar to a number of those posts. Where is the power lead from the MB that goes to the inverter? Anywhere near the left Shift-Ctrl-Z-X-C-Alt keys? Could that be the culprit?
Using a flashlight I can still see a faint image on the screen when it goes black.
DELL-Terry B
4 Operator
•
3.5K Posts
0
December 3rd, 2010 17:00
I looked up on the service manual, and the connection for the data cable that leads from the system board / video card to the LCD just happens to be near where you are talking about. So there can certainly be a bad connection there. I am going to shoot you a DM for your contact info and if the system is still under warrnaty set up a dispatch to correct this. If the system is not under warranty you will need to remove the keyboard unfortunatly to be able to get at the connector. I would try reseating the cable and see if that corrects the problem.
iradhall
1 Message
0
January 11th, 2011 08:00
I have a 1525 with the same issue. It goes black and comes back with no reason. It usually is just sitting there not being touched. I cannot seem to make it go off or come back on. It just randomly does it.
Any fix for this yet? Did you narrow it down to a connection or the LCD itself?