Mac Reboot problems, flickers on screen, followed by reboot, interrupted by 3 beeps repeatedly

I bought my MacBook Pro 13' in Nov 2013 and so far it has been performing satisfactorily, until very recently. It started about 10 days back when one day I suddenly started it while placing it on my lap. There were some strange flickers on the screen, after which the cursor did not respond and the system went on to restart. But it failed to restart and a series of three beeps kept repeating at short intervals. It happened about 10-12 times that day, especially when I moved the laptop from one place to another. I am now in Israel so iDigital handles the repairs here (my warranty expired so right now any repair's going to cost me). Anyway, I took it to the iDigital store the next day, but there weren't any problems, even when I moved it around quite a bit. I use the Mac for all important work, so I backed up everything before going. But there were no problems whatsoever. So I decided to go back to iDigital again, only if the problem recurred. Unfortunately, it did recur today and quite frequently. Only, this time I did not even move it. The flickers on the screen happen while working, followed by the cursor going unresponsive. The screen also flickers during booting process. Luckily, I managed to get a copy of the error message saved on my e-mail in the middle of all this. I am pasting it below. Any help will be greatly appreciated.

Anonymous UUID: C6EF4BC8-E9DB-2436-F888-F4419700BFC0

Sun May 1 23:44:20 2016

*** Panic Report ***

panic(cpu 2 caller 0xffffff800041e80a): Kernel trap at 0xffffff7f81055bfa, type 14=page fault, registers:

CR0: 0x0000000080010033, CR2: 0xffffff80b8bbbbd4, CR3: 0x0000000143191033, CR4: 0x00000000001626e0

RAX: 0x000000009600fef7, RBX: 0x00000000fc45cb95, RCX: 0x000000004c1aaef3, RDX: 0x000000002e5a5f67

RSP: 0xffffff8098bbbbb0, RBP: 0x00000000fc45cb95, RSI: 0x0000000063732d98, RDI: 0x00000000632ddcb3

R8: 0xffffff7f81082e90, R9: 0xffffff8098bbbd08, R10: 0xffffff8012c365bd, R11: 0x0000000000000000

R12: 0xffffff7f81085ae8, R13: 0x000000000000032c, R14: 0xffffff8098bbbd00, R15: 0xffffff8012c362bd

RFL: 0x0000000000010213, RIP: 0xffffff7f81055bfa, CS: 0x0000000000000008, SS: 0x0000000000000010

Fault CR2: 0xffffff80b8bbbbd4, Error code: 0x0000000000000000, Fault CPU: 0x2

Backtrace (CPU 2), Frame : Return Address

0xffffff8098bbb860 : 0xffffff800033a811

0xffffff8098bbb8e0 : 0xffffff800041e80a

0xffffff8098bbbaa0 : 0xffffff800043a443

0xffffff8098bbbac0 : 0xffffff7f81055bfa

Unaligned frame

Backtrace terminated-invalid frame pointer 0xfc45cb95

Kernel Extensions in backtrace:

com.apple.kec.corecrypto(1.0)[0CB1D8BD-9EB7-3A02-8274-BCBB852B55B4]@0xffffff7f8 101c000->0xffffff7f810b7fff

BSD process name corresponding to current thread: airportd

Mac OS version:

99Z999

Kernel version:

Darwin Kernel Version 14.0.0: Fri Sep 19 00:26:44 PDT 2014; root:xnu-2782.1.97~2/RELEASE_X86_64

Kernel UUID: 89E10306-BC78-3A3B-955C-7C4922577E61

__HIB text base: 0xffffff8000100000

System model name: MacBookPro9,2 (Mac-6F01561E16C75D06)

System uptime in nanoseconds: 114884344201

last loaded kext at 57087588226: com.apple.iokit.IOBluetoothSerialManager 4.3.0f10 (addr 0xffffff7f8154d000, size 65536)

loaded kexts:

com.apple.iokit.IOBluetoothSerialManager 4.3.0f10

com.apple.driver.AudioAUUC 1.70

com.apple.driver.AGPM 100.14.37

com.apple.driver.ApplePlatformEnabler 2.1.0d1

com.apple.driver.X86PlatformShim 1.0.0

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleOSXWatchdog 1

com.apple.driver.AppleMikeyHIDDriver 124

com.apple.driver.AppleHDAHardwareConfigDriver 266.5

com.apple.driver.AppleHDA 266.5

com.apple.driver.AppleMikeyDriver 266.5

com.apple.driver.AppleSMCLMU 2.0.4d1

com.apple.iokit.IOBluetoothUSBDFU 4.3.0f10

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.3.0f10

com.apple.driver.AppleUpstreamUserClient 3.6.1

com.apple.driver.AppleLPC 1.7.3

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.iokit.IOUserEthernet 1.0.1

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AppleHWAccess 1

com.apple.driver.AppleHV 1

com.apple.driver.AppleThunderboltIP 2.0.2

com.apple.driver.AppleMuxControl 3.7.21

com.apple.driver.AppleBacklight 170.4.12

com.apple.driver.AppleMCCSControl 1.2.10

com.apple.driver.AppleIntelHD4000Graphics 10.0.0

com.apple.driver.AppleIntelFramebufferCapri 10.0.0

com.apple.driver.SMCMotionSensor 3.0.4d1

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.driver.AppleUSBTCButtons 240.2

com.apple.driver.AppleIRController 327.5

com.apple.driver.AppleUSBTCKeyEventDriver 240.2

com.apple.driver.AppleUSBTCKeyboard 240.2

com.apple.driver.CoreStorageFsck 471

com.apple.driver.AppleFileSystemDriver 3.0.1

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 35

com.apple.iokit.SCSITaskUserClient 3.7.0

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCIBlockStorage 2.6.5

com.apple.driver.AirPort.Brcm4331 800.20.24

com.apple.driver.AppleUSBHub 705.4.1

com.apple.driver.AppleFWOHCI 5.5.2

com.apple.driver.AppleSDXC 1.6.5

com.apple.iokit.AppleBCM5701Ethernet 10.1.2b3

com.apple.driver.AirPort.Brcm4360 900.19.8

com.apple.driver.AppleAHCIPort 3.0.7

com.apple.driver.AppleUSBXHCI 705.4.14

com.apple.driver.AppleUSBEHCI 705.4.14

com.apple.driver.AppleSmartBatteryManager 161.0.0

com.apple.driver.AppleRTC 2.0

com.apple.driver.AppleACPIButtons 3.1

com.apple.driver.AppleHPET 1.8

com.apple.driver.AppleSMBIOS 2.1

com.apple.driver.AppleACPIEC 3.1

com.apple.driver.AppleAPIC 1.7

com.apple.driver.AppleIntelCPUPowerManagementClient 218.0.0

com.apple.nke.applicationfirewall 161

com.apple.security.quarantine 3

com.apple.security.TMSafetyNet 8

com.apple.driver.AppleIntelCPUPowerManagement 218.0.0

com.apple.iokit.IOSerialFamily 11

com.apple.kext.triggers 1.0

com.apple.driver.DspFuncLib 266.5

com.apple.kext.OSvKernDSPLib 1.15

com.apple.iokit.IOAudioFamily 200.6

com.apple.vecLib.kext 1.2.0

com.apple.driver.AppleSMBusPCI 1.0.12d1

com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.3.0f10

com.apple.iokit.IOFireWireIP 2.2.6

com.apple.driver.AppleHDAController 266.5

com.apple.iokit.IOHDAFamily 266.5

com.apple.driver.IOPlatformPluginLegacy 1.0.0

com.apple.driver.X86PlatformPlugin 1.0.0

com.apple.iokit.IOBluetoothFamily 4.3.0f10

com.apple.driver.AppleThunderboltEDMSink 4.0.2

com.apple.driver.AppleThunderboltDPOutAdapter 4.0.6

com.apple.driver.AppleGraphicsControl 3.7.21

com.apple.driver.AppleBacklightExpert 1.1.0

com.apple.driver.AppleSMBusController 1.0.13d1

com.apple.iokit.IOSurface 97

com.apple.iokit.IONDRVSupport 2.4.1

com.apple.iokit.IOAcceleratorFamily2 156.4

com.apple.AppleGraphicsDeviceControl 3.7.21

com.apple.iokit.IOGraphicsFamily 2.4.1

com.apple.driver.AppleSMC 3.1.9

com.apple.driver.IOPlatformPluginFamily 5.8.0d49

com.apple.iokit.IOUSBUserClient 705.4.0

com.apple.driver.AppleUSBMultitouch 245.2

com.apple.iokit.IOUSBHIDDriver 705.4.0

com.apple.driver.AppleUSBMergeNub 705.4.0

com.apple.driver.AppleUSBComposite 705.4.9

com.apple.driver.CoreStorage 471

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.7.0

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.driver.AppleThunderboltDPInAdapter 4.0.6

com.apple.driver.AppleThunderboltDPAdapterFamily 4.0.6

com.apple.driver.AppleThunderboltPCIDownAdapter 2.0.2

com.apple.driver.AppleThunderboltNHI 3.1.7

com.apple.iokit.IOThunderboltFamily 4.2.1

com.apple.iokit.IOAHCISerialATAPI 2.6.1

com.apple.iokit.IOSCSIArchitectureModelFamily 3.7.0

com.apple.iokit.IOFireWireFamily 4.5.6

com.apple.iokit.IOEthernetAVBController 1.0.3b3

com.apple.iokit.IO80211Family 700.52

com.apple.driver.mDNSOffloadUserClient 1.0.1b8

com.apple.iokit.IONetworkingFamily 3.2

com.apple.iokit.IOAHCIFamily 2.7.0

com.apple.iokit.IOUSBFamily 705.4.14

com.apple.driver.AppleEFINVRAM 2.0

com.apple.driver.AppleEFIRuntime 2.0

com.apple.iokit.IOHIDFamily 2.0.0

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 300.0

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.AppleKeyStore 2

com.apple.driver.AppleMobileFileIntegrity 1.0.5

com.apple.driver.AppleCredentialManager 1.0

com.apple.driver.DiskImages 389.1

com.apple.iokit.IOStorageFamily 2.0

com.apple.iokit.IOReportFamily 31

com.apple.driver.AppleFDEKeyStore 28.30

com.apple.driver.AppleACPIPlatform 3.1

com.apple.iokit.IOPCIFamily 2.9

com.apple.iokit.IOACPIFamily 1.4

com.apple.kec.corecrypto 1.0

com.apple.kec.Libm 1

com.apple.kec.pthread 1