It is more likely that a power problem or motherboard problem will happen before CPU fails.
You can test CPU to be sure by either replacing the existing RM-70 with another working CPU, or else by placing the existing RM-70 into another known working laptop.
It should be possible to replace RM-70 with other models. Turion X2 RM-70 is from 2008 and uses socket S1g2. Any other socket S1g2 CPU should also work:
Athlon X2 QL-60, 62, 64, 65, 66, 67
Turion X2 RM-70, 72, 74, 75, 76, 77
Turion X2 Ultra ZM-80, 82, 84, 85, 86, 87, 88
Hi and thank for your reply.
How can I test CPU? I don't have another laptop.
I think it could be a CPU issue because when I turn on my laptop I've got only a black screen and a blinking light on the keyboard.
I checked the blink-code on the laptop documentation and it should means a CPU problem.
Moreover, you mentioned also the X2 Ultra ZM-xx CPU series.
Let's take the ZM-86, if I correctly understood, it should have a different TDP (Thermal Design Power). Could it be a problem?
I do not know of a discrete "CPU tester". A CPU must be tested in a working motherboard.
So, choice #1: get a working 2008 AMD-based laptop and substitute your RM-70 for its CPU --> if it boots, then your RM-70 is OK. if it fails to boot, then your RM-70 is bad.
Choice #2: remove your RM-70, get a known working CPU and substitute it into your laptop --> if it boots, then you may infer that the RM-70 is bad; if it fails to boot, then your laptop has another problem.
All of the AMD dual core QL-, RM-, and ZM- series CPUs have the same 35W TDP, except for one version (there are 2 versions) of RM-70 is 31W and ZM-80 is 32W. Therefore, any of them should be OK with your laptop's cooler.
When you talked about doing a CPU test, I thought (and hoped) for a moment that there could be another way to test it than using another CPU or mother-board.
So now I'm going to buy another CPU (used, obviously) and I found both the RM-70 and ZM-82, for this reason I asked about the different TDP.
Anyway, I don't know yet my model TDP, but if it was the 31w one, what could happen if I replace with a 35w one?
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In that case, then it may run a few degrees warmer, but it should be ok. I do not think that HP designed a separate 31W cooler for a few AMD processors. Your laptop's cooler should be able to handle any of the 35W processors.