Mac book pro 10.5.7 sleep issue..... not even sydney genius bar can help me

Question

ok hey guys, this is my first ever post on a support forum so please help me out!
I'll give any specific hardware info if needed later on but this is the basics:
i have had my mbp for over a year and 6months into it my mbp started going into sleep mode for no reason ...and no im not simple the energy settings are set to never sleep so its not that. Since then i have tried and tested everything under the sun to resolve the issue i have been to the genius bar and booked it in several times, each time they tell me they can not find any problem. I have had the logic board replaced - i have tried removing the p.list files, resetting pram thingy the battery test thing....everything...i have looked on endless forums for a resolution but nothing works!, it will go to sleep at random times generally when im doing alot of things on it it can run fine for days maybe sometime weeks but then its starts playing up again. When it does sleep the screen goes blank and the power light pulses but worst it cuts the internet connection which is terrible coz i have a time capsule and it cuts that link as well and messes that up entirely! sometimes it will just keep cutting out every 20-40 seconds untill i wake it by tapping the space bar or moving my mouse sometimes it just shuts down completely - i have done a compete erase & reinstall but ill b honest i still reinstalled some programs from my backups that cant be downloaded anymore (isquint etc) coz the genius guys said maybe a program is corrupting the hardware but if anyone has any ANY ideas or has the same problem please! tell me - im sure i could add more info n stuff but if u want 2 ask me specifics then i will answer anything to help
thanx again guys.
i should say at this point the only relief im getting to stop it from sleeping is if i disconnect the power adapter and use the battery that seems to stop it, but it has crashed(slept) on battery power as well but as of today doing this seems to help ....hasn't crashed since writting this! LOL

Answer 1

Has anyone got any assumptions on suspect software that may cause my problem??
I see that louie has a possible response for you. I had forgotten about that problem.
lastfm, transmission or handbrake. Can anyone confim issues after installing these apps?
if not these softwares then im convinced im dealing with a power issue.
I would be doubtful (although not completely dismissive) of anything like these being the source of your problem.
the genius bar has said it may b an enviromental issue. this also may be the case, tho not so much recently. They said perhaps magnectic fields may cause it 2 go 2 sleep and its true moving my MBP around does seem to settle it for instance if i move it out of my room im yet to see any of my sleep issues occur
The movement sensor might be involved, as also louie's excellent suggestion of the temp sensor. It is difficult to know how to test these effectively and might need more tools than the GB can muster.
But i dont live in a electricity tower and i did move my MBP to the other side of my room where it worked for a good month - and then started again with the sparatic sleeping.
It is hard to disprove a negative. The only way to bring some sort of evidence to the table if there were some such interference would be to use the computer for an extended period away from where you are using it now. If it works without problem in (say) Starbucks or some other neutral area, and then fails within a few minutes of returning to your home, then there is something stronger to work with. Then you can start to track down some external source, I would guess.
So i will try a safe start as graham had suggetsed as this seems as a simple enough fix - but i do run a time capsule, ext 1TB HD, Wireless mouse etc ..which i presume will not work in safe mode .... and is the idea to just keep safe mode on untill it does crash again or will just starting up on safe mode then restarting solve the issue?
Time Machine ought to work in Safe Mode; and I would not suggest working that way for a lengthy period of time: just to start it up perhaps to clear something that is interfering. But what you write here is of interest: (A) The HD -- what is it (brand, etc, and how formatted) and how connected; plus the wireless mouse? What brand is that (and I presume you mean Bluetooth)?
As for A weak diode..I dunno what that is or how 2 check it
Right. I couldn't either, and most shops won't: they would just replace the board. There is a shop here . . . but that is too far for you.
i think the battery is ok ..as i said it performs better at this point when i disconnect the power...but not always... i had a terrible day yesterday when it would keep going to sleep everytime i reconnected the power, if i try 2 persist it will keep going back 2 sleep ever 30 seconds untill i eaither just leave it be for a while or untill it just turns off completely!
That suggests, as I mentioned earlier, something awry with the battery/power combination; especially if the performance is not consistent. A battery should deteriorate gradually, not come and go.
If it does turn off when i turn it back on it wont even get to the grey apple logo it just keeps turning off after 2-5 seconds (turning off not sleeping)
so im at a loss why that is!
No power. You have to wait a while until the power level is brought up to a workable level.
The power cord seems fine all the pins spring out - the middle spring is smaller than the others tho.
Mine too. That seems OK.
Do post those logs. Someone might see the answer.