Elecrow 7.0 bricked after uploading HelloWorld.ino

Hi,
I have an Elecrow Crowpanel 7.0.
I found in CrowPanel_ESP32_7.0\components\Arduino_GFX-master\examples\HelloWorld.ino. It compiles and uploads fine:

Sketch uses 366217 bytes (27%) of program storage space. Maximum is 1310720 bytes.
Global variables use 18960 bytes (5%) of dynamic memory, leaving 308720 bytes for local variables. Maximum is 327680 bytes.
esptool.py v4.6
Serial port COM5
Connecting....
Chip is ESP32-S3 (revision v0.2)
Features: WiFi, BLE
Crystal is 40MHz
MAC: 3c:84:27:f4:1b:cc
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Flash will be erased from 0x00000000 to 0x00004fff...
Flash will be erased from 0x00008000 to 0x00008fff...
Flash will be erased from 0x0000e000 to 0x0000ffff...
Flash will be erased from 0x00010000 to 0x00069fff...
Compressed 19504 bytes to 12970...
Writing at 0x00000000... (100 %)
Wrote 19504 bytes (12970 compressed) at 0x00000000 in 0.5 seconds (effective 291.0 kbit/s)...
Hash of data verified.
Compressed 3072 bytes to 146...
Writing at 0x00008000... (100 %)
Wrote 3072 bytes (146 compressed) at 0x00008000 in 0.1 seconds (effective 279.9 kbit/s)...
Hash of data verified.
Compressed 8192 bytes to 47...
Writing at 0x0000e000... (100 %)
Wrote 8192 bytes (47 compressed) at 0x0000e000 in 0.2 seconds (effective 412.8 kbit/s)...
Hash of data verified.
Compressed 366576 bytes to 199404...
Writing at 0x00010000... (7 %)
Writing at 0x0001bd98... (15 %)
Writing at 0x0002ba26... (23 %)
Writing at 0x00031100... (30 %)
Writing at 0x00036fa5... (38 %)
Writing at 0x0003ca73... (46 %)
Writing at 0x00042348... (53 %)
Writing at 0x00047982... (61 %)
Writing at 0x0004cea3... (69 %)
Writing at 0x00053252... (76 %)
Writing at 0x0005d041... (84 %)
Writing at 0x00062de8... (92 %)
Writing at 0x00068535... (100 %)
Wrote 366576 bytes (199404 compressed) at 0x00010000 in 3.7 seconds (effective 793.9 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...

BUT,
the screen is now unresponsive. A red led is on in the back but there is no other sign of life. Perhaps foolishly I did the same with another (new from box) Crowpanel 7.0 - same result. Before the upload the system showed the lvgl demo, but after the upload it is apparently a brick.
Board selection is set to Elecrow Crowpanel 7.0p.
I didn't see any mention of this in discussions so far. Does anyone have any ideas?
Thanks,
Daye