Windows 7: Laptop freeze even in bios

hello guys..

i have ibm thinkpad t43 which is im trying to repair it but it seems i need to convience my self if its really a overheating issue.. now heres the scenario, its started last week when everytime i turn it on after booting the OS(windows 7) after approximately 4-6 minutes it will suddenly freeze and then after how many days observing it.. even in bios mode which is i observing it as well, it still freeze... im suspected my motherboard either but since theres some expert here i really need your opinion about this one .. thank you

Do you hear the fans running? Does it take longer to happen when the laptop is in a cold environment vs a really warm one?

yea the fan is all good.. its happens randomly even i just used it for about 3 for 5 minutes.. either warm or cold environment

It might be the ram... try pulling out one stick then the other and see if that helps.

Agreed, process of elimination, id remove everything not needed, cd rom, hdd, and use only one ram stick,,,, test if all is good then the next ram stick ,,, if all good add the cd etc etc,,,,,,
Im guessing its something with the hard drive but thats just a guess.
Good luck

I wouldn't think it is the HDD... If it's affecting the BIOS menu then it has to be one of the core components (CPU, Motherboard, RAM, PSU, then maybe display or keyboard. and maybe GPU).

On a laptop, if it isn't the memory, hard drive, or cpu (if removeable), then the problem is probably irreparable.

Guys thank you so much for all of your response, modem, wireless component, hdd, and yea ram i got 2 stick and tried to use only one or even swap it, i thought it was ram before becos when i tried to memtest the memory without OS it suddenly freeze but without error indicated just freeze BUT heres wht i notice even it freeze the + sign in memtest is still blinking or let say the cursor still blinking but i cant do anything.. Graphics is good point but i need more support .. I really suspect the heat i have actually cooling pad for it but the heat is just really intense f try to touch its buttom.

Do you see any discolouration of the plastic? It could be possible the vents are blocked or fans are working inefficently. Do you have any sort of themometer you can use to figure out how hot the system is getting?

How many seconds can you touch the hot spot with your fingers before you're forced to pull away? There's a means of calculating the temperature using that but I have to look it up.

I did disassemble the laptop to check the problem , i clean the buttom of the motherboard, checking for all the dust, vent is all good no dis coloration, i can touch it until 5 seconds, and i think the fan is working good but its not efficient enough to make my system cool