VOGONS


First post, by megatron-uk

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I have a number of old laptops that I am restoring, some may make it, some won't! But all have a common issue of excess heat and fan noise.

I suspect most of this is down to the thermal interface material degrading. In fact some of the models I have taken apart show the thermal pad has gone hard and brittle, so I expect has not been transferring heat effectively... Or at all!

These pads vary in thickness depending on whether they are on mmc-1 or mmc-2 modules or on soldered on parts. Most are PII or PIII / Celeron processors.

Is there anywhere I can get an assortment of thickness pads to replace these? Most are beyond the ability of thermal paste to take up the space between die and heatsink.

My collection database and technical wiki:
https://www.target-earth.net

Reply 1 of 5, by megatron-uk

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Heres an example:

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Crusty!

My collection database and technical wiki:
https://www.target-earth.net

Reply 4 of 5, by megatron-uk

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I had a bit of a search today and found some that were available in a reasonable time frame.

The thinnest I could find without spending more money than the laptops themselves were 0.5mm. I suspect that's fine for most of the pads I've seen, though possibly needing to double up on the mmc-2 modules which seem to use a thicker pad.

My collection database and technical wiki:
https://www.target-earth.net

Reply 5 of 5, by MikeSG

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If you want to "set it and forget". Try thermal phase-changing material. Such as Honeywell ptm-7950.

Resists pump out and dry up.

You can't use thermal pads on the CPUs on laptops. Needs to be a thermal paste or phase-change material. Pads only transfer 1-5 degrees per second. Thermal paste/PCM transfers 10-50 degrees per second.