CHiLL Posted October 14, 2019 Posted October 14, 2019 One of our staff smashed their Toshiba Sattelite Pro R50-B screen and I've ordered a replacement screen through one of our trusted resellers. Now, I have replaced one of these screens before (albeit about 4 years ago) and I'm pretty sure what I've done is correct. I disassebled the laptop, unscewed the screen and removed the ribbon cable. I put put the new screen, attached the ribbon cable and powered on the laptop. (What I didn't realise, is that the laptop doesn't need much disassebly, only the bezel of the screen and two caps at the hinges need to come off to reveal the screws). Anyway, the backlight of the screen is powering on, but I'm getting no image, not even a BIOS/POST screen. It works with a monitor attached via the VGA port though. After some Googling, a few different replies on various forums suggested resetting the BIOS - so I did by taking the CMOS battery out for a while. Once re-connected and turned on, I get the same issue. I know invertors can be problematic in laptops, but I thought that if the invertor went, you wouldn't even get the backlight? It's only the one ribbon cable that connects the screen to the motherboard, so transmits both power and VGA. The ribbon cable also appears to have a breakout cable under the tape that then carries on to the webcam. I have a repair shop not far from where I live that we use to repair laptops and iPads that are beyond our skills, but I'd rather only take it if I have to - I'd prefer to get it working myself is possible. Does anyone have any ideas?
chazzy2501 Posted October 14, 2019 Posted October 14, 2019 I check the cable is seated correctly, most new panels use a 30pin eDP and are pretty compatible. back on LVDS panels you could get panel with a single revision change and it was no dice. Its always safer to order the panel number (from the old panel) than a panel for your laptop model.
CHiLL Posted October 14, 2019 Author Posted October 14, 2019 (edited) I check the cable is seated correctly, most new panels use a 30pin eDP and are pretty compatible. back on LVDS panels you could get panel with a single revision change and it was no dice. Its always safer to order the panel number (from the old panel) than a panel for your laptop model. I have triple checked that connector and it is as secure as it can be. When the laptop powers on, it powers on fine with nothing on the display. I can use Impero to remotely control the laptop and noticed that Windows is picking up the display and correct resolution. Device Manager shows a 'Generic PnP Monitor', so it definately knows it's there. (I have also checked the brightness, which is at 100%) Edited October 14, 2019 by CHiLL
DrBeaker Posted October 14, 2019 Posted October 14, 2019 How old is the laptop itself? That would be the decider for me personally if it's out of warranty. My time spent fixing it overall would cost more than a replacement.
rascalhole Posted October 15, 2019 Posted October 15, 2019 I have triple checked that connector and it is as secure as it can be. When the laptop powers on, it powers on fine with nothing on the display. I can use Impero to remotely control the laptop and noticed that Windows is picking up the display and correct resolution. Device Manager shows a 'Generic PnP Monitor', so it definately knows it's there. Is the socket connected to the main board properly? does the screen work in other laptops?
CHiLL Posted October 15, 2019 Author Posted October 15, 2019 The screen does have four screw brackets to mount to the chassis and one of those was bent almost 90 degrees on delivery. I used some pliers to straighten it out so it would line up and that was fine, though I'm wondering if there's also some other underlying issues. It doesn't explain why the old cracked screen doesn't work anymore and has the same symtoms (in terms of what is/not displayed). I've raised it with our supplier who said it may be classed as DOA and could send a replacement. How old is the laptop itself? That would be the decider for me personally if it's out of warranty. My time spent fixing it overall would cost more than a replacement. It's approximately 5 years old and we still have older laptops in circulation. I think it still performs well enough to suit staff's needs. Is the socket connected to the main board properly? does the screen work in other laptops? I haven't tried and the only Toshiba R50-B laptops we have are allocated to staff as use-at-home laptops. I don't particularly feel like getting one of those in and potentially breaking that too.
crc-ict Posted October 15, 2019 Posted October 15, 2019 Is it possible that the cable and/or connector has become damaged in the removal/reinstallation process? Some laptop display cables can be incredibly fragile.
CHiLL Posted October 15, 2019 Author Posted October 15, 2019 Is it possible that the cable and/or connector has become damaged in the removal/reinstallation process? Some laptop display cables can be incredibly fragile. Certainly a possibility, though I can't see any physical damage on the connector or socket.
chazzy2501 Posted October 15, 2019 Posted October 15, 2019 I'm thinking that the Graphics output has been spiked and is now dead, there is a small chance that un-powering the laptop, battery and all for 20 plus minutes will bring it back. (resettable fuses, anti static protections etc.)
CHiLL Posted October 15, 2019 Author Posted October 15, 2019 I'm thinking that the Graphics output has been spiked and is now dead, there is a small chance that un-powering the laptop, battery and all for 20 plus minutes will bring it back. (resettable fuses, anti static protections etc.) But wouldn't that mean it wouldn't output to a secondary display - which is does?
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