HP dv6 1211ax overheating issue and causing blink code 4

My hp dv6 1211 ax laptop is 5 year old and causes overheating. Now my laptop won't boot and I am left with the famous caps and num lock led blink code 4. I tried covering the dents with a thick towel and overheating the laptop and it worked. But it's not possible to do each time. Moreover this method is also fading as now to boot my laptop once I need to do it 2-3 times (overheating method). I tried a repairing centre and they were unable to help. I am tired of this issue and even if they would be able to fix it hp dv6-1211ax has its history in terms of overheating.
Please help me as I am considering a full upgrade of processor and even motherboard if required. Is it possible to upgrade my laptop from amd to intel ? And if upgrading is possible what are the possibilities ? Please help asap.

HP Pavilion DV6, 1211AX Laptop Specification:
Processor: AMD Turion X2 Processor RM-75 (2.2 GHz), Dual Core
Chipset: AMD M770
L2 Cache : 1MB
FSB : Upto 3600MHz
4GB PC2-6400 DDR2 RAM (800MHz)
320GB SATA Hard Disk Drive with HDD Protection ( RPM 5400)
Super Multi Drive DVD +/- RW / +/-R Writer (Light Scibe)
15.6″ Widescreen (WXGA) with Brightview Technology
Windows Vista Home Premium Operating System (32Bit)
FingerPrint Reader
ATI Mobility Radeon HD 4650 -1GB Dedicated Graphics
One HDMI v1.3 Port
One eSATA/USB Combo Port
3 USB 2.0 Ports


Thank You