By David Coe, founder and bench technician
Gaming laptop shuts down under load: heat or power?
A gaming laptop that dies mid-game is doing one of two very different things: managing heat (graceful shutdown, then it boots normally warm) or losing a power rail (instant black, like the plug was pulled). The two look similar to a customer and are completely different jobs for a bench. This is how shops tell them apart before quoting.
Tell them apart
- Graceful shutdown with a warm chassis (usually thermal: the system protected itself. Repaste, clean the intake, check fan curves) and if it still does it, the board is the next suspect.
- Instant cut, like a power loss: usually electrical: a rail that browns out or a fault that trips under load. This is GPU power stages, VRM faults or the adapter, and it is quote-a-repair territory, not paste territory.
- Timing: dies at exactly 10–15 minutes of any load: thermal path. Dies at the first hard frame or the first big current draw: power path.
- The adapter: an underspecced or tired charger that sags under load produces convincing "the GPU is dying" symptoms for four pounds of replacement cost. Rule it out first, always.
When it is the board
Persistent shutdowns with a clean thermal path point at the voltage-regulator stages around the GPU and CPU: a marginal stage that holds at idle and collapses under load, or a temperature-sensitive fault on the board. This is measured on the bench under load (the same conditions the customer's game creates) and the failing stage is reworked or replaced at component level. It lands in the fixed £120 + VAT laptop logic board repair where the work fits, post both ways included; bigger reconstructions get a revised quote before anything paid.
What to send, and one warning
Send the complete machine and its adapter. Load faults reproduce on the bench with the right power source, and the wrong adapter is its own red herring. And one honest warning for the customer: continuing to run a machine that cuts under load is how a marginal rail becomes a dead board. Once it is shutting down, that is the moment to stop the stress tests.
Thermal shutdown questions
Does repasting fix shutdown under load?
Sometimes. Rule the thermal path out first. If it persists with clean cooling, it is electrical: power stages measured under load at the bench and reworked at component level.
Instant black vs graceful shutdown. What's the difference?
Graceful shutdown with heat is the system protecting itself; instant black like the plug was pulled is a rail browning out. One is thermal, the other is power. Different jobs, different quotes.
Is it dangerous to keep using it?
Yes. Continuing to run a machine that cuts under load is how a marginal rail becomes a dead board. Once it is shutting down, stop the stress tests.
What does the repair cost?
£120 + VAT where the work fits, post both ways included, with a revised quote for anything bigger; £180 + VAT in the priority slot. Diagnosis is £35 + VAT, waived when the repair goes ahead.
The books are full. Join the list
Our bench is at capacity, so we are not taking new jobs right this moment. Open a trade account and we will email you the moment we are booking again. No commitment. Questions? Email jobs@soldersector.com.
