Dell G3 laptop repair in McCrae
A client on Jetty Road contacted us after their Dell G3 15 gaming laptop had been shutting down randomly for several weeks.
The shutdowns had no pattern. Sometimes the machine would run for hours without issue and then cut off abruptly mid-task. Other times it would shut down within minutes of starting up. There was no BSOD, no warning and no error message of any kind. The machine would simply power off as if the power button had been held down, then restart normally. The client had reinstalled Windows thinking it was a software fault, which had made no difference.
A random shutdown with no BSOD and no warning is a distinctive fault pattern. BSODs occur when Windows detects a software or driver fault and has time to generate a crash dump before halting. An abrupt poweroff with no screen output, no BSOD and no event log entry in Windows is almost always a hardware fault that bypasses Windows entirely, either a thermal shutdown from CPU overheating, a PSU or power delivery fault, or a RAM fault causing a hard memory error that the system cannot recover from.
We ran a CrystalDiskInfo health check on the drive and a CPU temperature check under load. Both came back clean. We then ran Memtest86 from a bootable USB drive. Memtest86 tests RAM independently of the operating system, which is critical because Windows itself cannot reliably test the RAM it is actively using. After one pass Memtest86 reported 47 errors across a specific address range, all pointing to the second RAM stick in the dual-channel configuration. A single RAM stick with a failing cell cluster producing hard memory errors under load is one of the most reliable causes of the abrupt no-BSOD random shutdown pattern the client was experiencing.
The Dell G3 15 ships with two DDR4 SO-DIMM slots. The machine had two 4GB sticks installed in dual channel configuration. We removed the failing 4GB stick and ran Memtest86 again on the single remaining stick. Zero errors across two full passes, confirming the fault was isolated to the removed stick and the remaining stick was healthy. We replaced the faulty stick with a single 8GB Kingston ValueRAM DDR4 3200MHz SO-DIMM, bringing the machine to 12GB total in a mixed configuration.
We chose the Kingston ValueRAM over upgrading to a matched 8GB pair for a specific reason. The client’s use case was light home and office work with no gaming or video editing, and 12GB of mixed configuration RAM is entirely adequate for that workload. A matched 8GB pair would have given dual-channel operation at 16GB total and a modest performance benefit, but at roughly double the cost for a machine used for email and documents the additional spend was not justified. We ran a full Memtest86 pass after the replacement. Zero errors. The machine has had no random shutdowns since.
Issues with a laptop? Not booting? Get in touch with one of our technicians on 0484 357 559
