Flashed wrong ROM on tablet and stuck in blue screen with no recovery screen

Device specs:

• CPU: Allwinner A31S, Quad Core ARMv7 Processor (VFPv4, NEON)


• GPU: PowerVR SGX 544MP


• Motherboard: INGENIC-CROSS Q8S-v1.0 2013-04-22


• Version of Android: 4.2.2


• Build Number: fiber_q8s-eng 4.2.2 JDQ39 20130723 test-keys

Nothing is visible on the screen except for a blue screen. Please help.