Dell Inspiron 7506 Silver 2n1 - "HELLCAT 15" - No power
Hi everyone, I have an Inspiron 7506 laptop I've had for a few years, and it'd occasionally have a problem where after I'd power it off, it wouldn't turn on again unless I disconnected, drained residual voltage by pressing the power button, and reconnected the battery. It now seems to be occurring every single time I shut down the laptop and attempt to turn it back on again. I have done all the common troubleshooting steps, such as completely disconnecting the battery & CMOS battery and draining the voltage and leaving it for an hour, and I've even replaced the battery. This is definitely not an issue with the battery; the battery connector on the motherboard shows the correct voltage (~19v) during the no power state. The laptop also does not turn on when plugging in an AC power cable with the battery disconnected.
I believe it's likely something to do with a FET not turning off completely and/or something with the power regulation chip. I've done some research, and it seems to be a relatively common problem on the 7000 series line of Inspiron laptops; however, there are very few fixes available. This Reddit post, and more specifically the comment, seemed to describe my exact problem, but their fix did not work for me. For additional context, I've had the laptop for about 3 or 4 years now, and in that time I've replaced the battery and upgraded the RAM & SSD. Physically, there is nothing wrong with the laptop due to damage/drops.
Let me know what I should try or what the next steps will be. I have good general electronics knowledge and access to a good multimeter, oscilloscope, and SMD soldering station, but I'm not experienced with laptop repair specifically. To make it easier, here's the link to the board schematic I found on another Badcaps thread.
I believe it's likely something to do with a FET not turning off completely and/or something with the power regulation chip. I've done some research, and it seems to be a relatively common problem on the 7000 series line of Inspiron laptops; however, there are very few fixes available. This Reddit post, and more specifically the comment, seemed to describe my exact problem, but their fix did not work for me. For additional context, I've had the laptop for about 3 or 4 years now, and in that time I've replaced the battery and upgraded the RAM & SSD. Physically, there is nothing wrong with the laptop due to damage/drops.
Let me know what I should try or what the next steps will be. I have good general electronics knowledge and access to a good multimeter, oscilloscope, and SMD soldering station, but I'm not experienced with laptop repair specifically. To make it easier, here's the link to the board schematic I found on another Badcaps thread.