Following on from Sleepy iMac, here are some capacitors that might be a good fit.
I was provided with a second hand G5 iMac 1.8 GHz (A1058) PowerMac 8.2 (not A1144). Unfortunately, it overheats and then shuts down, or rather, goes to sleep, shortly after being powered on. This self imposed sleep happens quickly, especially if the processor is being pushed, such as by running a full screen video in VLC.
Looking for an internal 2.5″ 2TB HDD for your MacBook, or MacBook Pro? The cheapest option is to get a Seagate Backup Slim (STDR200020x where x=0/1/2/3) USB external disk and rip its guts out. It is the only 9.5 mm high, 2.5″ 2TB internal disk on the market (or was in 2015), and I believe that it still is – even in late 2017.
In Bangkok, an internal disk such as a Seagate Barracuda ST2000DM006 2TB 64MB Cache SATA III 6.0Gb/s is around 3350 baht, or more precisely:
whereas the Seagate Backup Slim is normally 2620/2590 baht (depending on where you shop), or 2360 baht on offer (I actually ended up paying 2290 baht at a sale, with a soft case and a OTG mobile adapter thrown in).
Other disks are too fat (i.e. tall) at 12 mm, or 15 mm, to fit in the MacBook internal disk bay. other heights may be 6 mm, 7 mm (ST2000LM00x, where x=3/7).
The STGD2000400 is physically the same disk (9.6 mm thick), but it is pre-formatted for the PS4. There is also an XBox formatted disk (SRD0NF1/STEA2000403), although, as the external case is 14.8 mm thick, the disk itself may be oversized – note that the external case of the Backup Slim is 12.1 mm.
Also covered are the Seagate Backup Plus Fast, and Seagate Backup Plus.