The blinking pattern you’re observing on your Dell Inspiron 3558 (4 times amber followed by 1 time white) indicates a Battery Issue. Since your laptop is an older model, it’s possible that the battery has reached the end of its lifespan. Battery Replacement: You’ll need to replace the battery. You can find compatible replacement batteries for your Dell Inspiron 3558. Here’s a link to a replacement battery that you can consider. Battery Report Check: Create a battery report to check the status of your current battery. Open a Command Prompt window (search for 'cmd' in the Start menu). Type the following command and press Enter: powercfg /batteryreport This will generate a battery report. Locate the report file (usually saved in your user folder) and open it. Compare the Design Capacity value with the Full Charge Capacity value. For a healthy battery, these values should be nearly the same. Temporary fix/Workaround: Hard Reset Turn off the laptop. Disconnect  the AC adapter and remove the battery or simply remove the base cover and disconnect the battery cable. Disconnect all devices such as USB drives, printers, webcams, and media cards (SD/xD). Press and hold the power button for 15 to 20 seconds to drain the residual power. Connect the AC adapter and battery. Turn on the computer. If you still need assistance, please contact support by clicking the ‘Get Help Now’ button located at the bottom right corner of the page. The button is marked with a help icon for easy recognition as per the picture below:

So the battery health is on 71% the voltage is between 15290mV ~ 15293mV the charging state is on idle and no current flow temperature -54c??? battery is dying that is the reason of the light Can I change the battery for one with bigger capacity?

The blinking pattern you’re observing on your Dell Inspiron 3558 (4 times amber followed by 1 time white) indicates a Battery Issue. Since your laptop is an older model, it’s possible that the battery has reached the end of its lifespan. Battery Replacement: You’ll need to replace the battery. You can find compatible replacement batteries for your Dell Inspiron 3558. Here’s a link to a replacement battery that you can consider. Battery Report Check: Create a battery report to check the status of your current battery. Open a Command Prompt window (search for 'cmd' in the Start menu). Type the following command and press Enter: powercfg /batteryreport This will generate a battery report. Locate the report file (usually saved in your user folder) and open it. Compare the Design Capacity value with the Full Charge Capacity value. For a healthy battery, these values should be nearly the same. Temporary fix/Workaround: Hard Reset Turn off the laptop. Disconnect  the AC adapter and remove the battery or simply remove the base cover and disconnect the battery cable. Disconnect all devices such as USB drives, printers, webcams, and media cards (SD/xD). Press and hold the power button for 15 to 20 seconds to drain the residual power. Connect the AC adapter and battery. Turn on the computer.If you still need assistance, please contact support by clicking the ‘Get Help Now’ button located at the bottom right corner of the page. The button is marked with a help icon for easy recognition as per the picture below:

Hello…thanks for the quick response. I tried what you said. The BIOS states 150W under AC Adapter Type. I also unplugged it to see if the BIOS detected a change, and it did…it stated NONE. So it seems to be detecting ok, right? Something I might not have said in original post is that the light continues to blink whether running on AC power or Battery power. While plugged in, the battery meter always states 'a percentage' 'plugged in' 'not charging'… but battery seems to be charging. Current state is [96% available (plugged-in, not charging). I would think the battery should be a lot less than this by now if not charging. Strange. I just unplugged the battery with the system running to test the battery meter on the battery…shows all led lights lit. However, when I just plugged the battery back in, a Windows message appeared stating 'The model number for the primary battery is non-recommended. The battery cannot provide sufficient power to run the system on battery mode. Please insert a Dell battery for best system operation.' I would had never seen this unless I would have unplugged and replugged the battery with windows running. The original battery and the battery I just purchased are both from Dell. They are 'Dell Battery Module, Type R795X Rating: 11.1V Capacity 90Wh. Hope this helps. Sounds like a system/bios update issue of not detecting the battery properly, right? Thanks again.

If you're experiencing no post issues with your laptop, please don't hesitate to contact our support team. You can use the Get Help Now chat feature located at the bottom right corner of the page. The chat button is marked with a help icon for easy recognition, as shown in the image below: Additionally, we recommend performing a hard reset, as this has resolved the issue for some users: Turn off your computer. Disconnect the power adapter. Remove the base cover. Disconnect the battery cable. Press and hold the power button for 20-30 seconds to drain any residual power. Reconnect the battery cable. Reinstall the base cover. Reconnect the power adapter. Turn on your computer.

Based on the article 'A Reference Guide to the XPS Laptop Diagnostic Indicators,' this pattern indicates CMOS battery failure. In such instances, we recommend replacing your coin-cell battery as per your product manual. If you still need assistance, please contact support by clicking the ‘Get Help Now’ button located at the bottom right corner of the page. The button is marked with a help icon for easy recognition as per the picture below:

Does the system correctly identify the battery?

RAM issue, visually inspect it to see if any chip looks damaged on the sticks If no visible damages, install one at the time and see if anything changes If nothing happens after the test you might need new ram, if even with new ram fails, it’s a Motherboard issue