I just recieved thisdellmonitor from my brother worked fine for him (yes I seen it work) I pluged it in and cable and got safe mode on screen I hit a key tryed to use mouse nothing. turned it off used another key board restarted and same thing . unpluged monitor and got floating self test. How can I get this thing to work besides buy a new one?????Oh and formost my monitor is E151FPB model
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If it works in service mode, then it is not a hardware problem. Boot Windows in "Safe Mode" using the F5 Key as it is Booting to Windows. That should make it re-discover the KB and Mouse. Make sure the KB and Mouse are pluged into the right ports. Mouse Green and KB Purple
try to boot in safe mode first. turn on computer then keep tapping on F8 then boot to safe mode. once you booted in safe mode try to open notepad and word check if all keys working. if yes then try system restore it might be some conflict when in normal mode. if keys same problem in safe mode then try last known good configuration if still having the same problem with normal mode then try booting to F8 safe mode with networking. download the latest toucpad drivers and the latest bios for your system. install all downloaded updates then boot back to normal mode after. check if still the same problem. if yes then try to do system restore to the previous state when laptop keys was working fine. if all fails try to re-install the OS. if fails then have your touchpad, keyboard and palmrest replaced. (Note: when troubleshooting make sure you are using an external mouse and keyboard thru USB)
The screen goes black while in normal mode right? So try to boot in safe mode (power on then keep tapping F8 then select safe mode). Check if still happens in safe mode.
If screen does not goes black in safe mode it means there might be a software or driver causes problem when running in normal mode. You can try the following (update your anti virus software then run a full system scan, uninstall the video driver then download and install the latest one, uninstall any previous windows update or you can system restore to the time when it was working fine).
If the screen goes black even in safe mode they try connecting the laptop to an external monitor if still goes black, if yes then absolutely no issues with the LCD panel. You can try (uninstall and reinstall the video driver if still persist then this might end up replacing video card or motherboard, but before doing that update the BIOS first).
If does not goes black in ext monitor then the LCD panel might causes the problem. Reseat the LCD cable or inverter if you can.
Okay, easiest first. In Safe Mode, your sound won't work. Safe Mode means only enough drivers to make your PC more than a doorstop get loaded, so that's okay.
Second, if it boots to Safe Mode without difficulty, try running System Restore in System Tools. Go back to some date before when your issue started. That should get you going. Don't worry, your data files will not be affected in System Restore. I hope this helps.