I believe that 4 beeps is memory failure. If you still get the error, you must diagnose whether it's an issue with a RAM module or a slot, by performing four tests, testing just one module at a time: If module 1 works in slot A and B, and module 2 does not work in either, then module 2 is bad.If module 1 and 2 work in slot A but neither works in slot B, then slot B is bad.etc. Before each test, follow steps 1-4 again. If none of those tests gives you a working system, then your motherboard may have failed. Questions: When you say that you replaced the RAM, do you mean that you removed it and reinstalled the same RAM modules? Or, did you upgrade to different RAM? If it's the latter, then perhaps the new RAM is incompatible with your system. Whenever touching components or working inside a computer, wear a grounded wrist strap, also called anti-static wrist strap, ESD wrist strap, or ground bracelet. It's a cheap and sensible precaution. Rest the laptop on an anti-static mat or at least a reasonable alternative such as corrugated cardboard. (Repeatedly touching a metal case part is not sufficient mitigation with modern components.)
My old 2012 laptop XPS 15 L521x, got the following issues, any thoughts what could be wrong? 1. No display or screen is dark after turning it on. 2. It gave 4 beeps, sometimes just 4 beeps once, sometimes continue keeping 4 beeps. 3. I can hear fan is running, backlight on keyboard is on as well, so, I knew system has been boot up. 4. Replaced the ram on two slots, but still same thing, no display, still beeping. Should I conclude the motherboard is gone or it is from something else? Thanks,
XPS 15 L521X, screen is dark, what could be wrong?