I have a Dell E1405 Inspiron, I refurbished it adding an updated (64 bit) CPU (T5500) among other things; I should mention I bought a job lot of 4 of the same laptop and did exactly the same with all of them. I also added an SSD and installed Windows 10. They all worked fine and I have since sold two of them. However, one developed a shorted motherboard; I'm looking into that, but the other one, which had been working just fine and I had put on sale, suddenly developed a keyboard problem. When you type r you get r5, q gets q', u gets u6 and so on. It's only the top two rows of the keyboard that do this. So I checked the on screen keyboard and that was fine, I added an external wireless keyboard and that too was fine. I therefore felt it was the keyboard, so I swapped it with all the other three i had in turn (which were working fine on the other laptops) but I got the same result with all of them. So it clearly isn't a keyboard problem, so I presumed it must be a problem with the SIO chip. I therefore replaced that, but it's still the same! I'm now tearing my hair out! I have found several reports of people having this exact same problem on the internet with various laptops, but not one where they found a solution! (Or at least if they did, they didn't share it!) If anyone has any ideas (other than installing drivers, which of course doesn't work) I would be very pleased to hear from them. If I at least had a different problem after fitting the new chip I could have said it must have been that, but with exactly the same problem, clearly that it VERY unlikely! Help, please!
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Re: Keyboard problem on Dell Inspiron
KB connector or debouncing cap maybe.OpenBoardView — https://github.com/OpenBoardView/OpenBoardView -
Re: Keyboard problem on Dell Inspiron
Thanks for the suggestion, I'll look into the connector, though I did think about the connection itself and with the number of times I changed it, with different keyboards, etc., it seems unlikely to be a connection problem, but I will scrutinise the connection to make sure. Please could you elaborate on the capacitor idea? What exactly would I be looking for? There are no shorted capacitors for sure... Thanks again...Comment
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Re: Keyboard problem on Dell Inspiron
After much investigation I have found that by disconnecting the touch pad from the motherboard the keyboard works fine! So, it looks like it might be something to do with the touchpad! I will update when I get to the bottom of it!Comment
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Re: Keyboard problem on Dell Inspiron
Fixed! It was the touchpad ribbon cable! Swapped it with another one and it all works fine! Seems very strange that the touchpad cable should affect the keyboard operation, especially as the touchpad and buttons were working fine! Who knows!Last edited by Colin21958; 05-04-2021, 01:56 PM.Comment
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Hello, I have a Dell 15R-5521, with the problem that the Ctrl, Alt, Shitf and Num Lock keys do not work, I tested the keyboard with a keyboard tester and it is functional, I also got another new keyboard and the computer has the same problem with the same keys. Check continuity between the ZIF connector from the keyboard to the KBC and all pins are correct. I cleaned the ZIF connector and the KBC and I still have the same problem. I reinstalled windows just in case, and it didn't work. I updated the BIOS to the latest version A16 and there were no changes.
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This specification for the DELL Inspiron 3650 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the Inspiron 3650 boardview and Inspiron 3650 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for DELL...09-12-2024, 03:44 PM
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This specification for the DELL Inspiron 3650 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the Inspiron 3650 boardview and Inspiron 3650 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for DELL...09-12-2024, 03:44 PM
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This specification for the DELL Inspiron 3650 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the Inspiron 3650 boardview and Inspiron 3650 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for DELL...09-12-2024, 03:44 PM
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This specification for the DELL Inspiron 3668 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the Inspiron 3668 boardview and Inspiron 3668 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for DELL...09-12-2024, 03:36 PM
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